You searched for subject:(QED).
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1.
Kanagin, Andrew N.
Design and modeling of a cryogenic system for circuit QED experiments.
Degree: 2018, University of Nevada – Reno
URL: http://hdl.handle.net/11714/4552 
► This thesis will cover the thermal and electromagnetic design and modeling of a cryogenic system to perform circuit QED measurements. The objective of our research…
(more)
▼ This thesis will cover the thermal and electromagnetic design and modeling of a cryogenic system to perform circuit
QED measurements. The objective of our research is to grow doped cryogenic crystals and perform quantum measurements on atoms implanted inside the crystals. The crystals are typically made from rare gases or light molecules and will be grown on a superconducting planar waveguide resonator, which we will use to measure different properties of the crystals and the doped material within. However, to create these unique types of crystals and perform certain measurements requires careful engineering. Within this thesis we will describe our technique to create an isotopically pure crystal of para-hydrogen. Furthermore we will describe the additional modifications required to perform circuit
QED mea- surements on the thermally-polarized atoms implanted inside the crystal. Finally we will model the electromagnetic fields for the shielding which is the final barrier for our crystals from the environment.
Advisors/Committee Members: Weinstein, Jonathan D. (advisor), Neill, Paul (committee member), Varganov, Sergey (committee member).
Subjects/Keywords: Cryogenic; Crystal; QED; Superconductor
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APA (6th Edition):
Kanagin, A. N. (2018). Design and modeling of a cryogenic system for circuit QED experiments. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/4552
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kanagin, Andrew N. “Design and modeling of a cryogenic system for circuit QED experiments.” 2018. Thesis, University of Nevada – Reno. Accessed March 07, 2021.
http://hdl.handle.net/11714/4552.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kanagin, Andrew N. “Design and modeling of a cryogenic system for circuit QED experiments.” 2018. Web. 07 Mar 2021.
Vancouver:
Kanagin AN. Design and modeling of a cryogenic system for circuit QED experiments. [Internet] [Thesis]. University of Nevada – Reno; 2018. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11714/4552.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kanagin AN. Design and modeling of a cryogenic system for circuit QED experiments. [Thesis]. University of Nevada – Reno; 2018. Available from: http://hdl.handle.net/11714/4552
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Leiden University
2.
Huang, Mengzi.
Quantum Error Detection by Stabiliser Measurements in a Logical Qubit.
Degree: 2015, Leiden University
URL: http://hdl.handle.net/1887/43979
► Quantum computing promises to deliver exponential speed-up over classical machines in solving specific problems. However, quantum information is susceptible to decoherence and errors, and fault-tolerant…
(more)
▼ Quantum computing promises to deliver exponential speed-up
over classical machines in solving specific problems. However,
quantum information is susceptible to decoherence and errors, and fault-tolerant quantum computing (FTQC) is the only realistic approach. In FTQC, operations are performed on logical qubits which are encoded in physical qubits such that errors are correctable or trackable. Specifically, in the repetition code for quantum error correction (QEC), qubits are encoded in Greenberger-Horne-Zeilinger (GHZ)-type states to be protected from bit-flip or phase-flip errors. It is important not to leave the protected subspace at any time to meet the basic requirement for FTQC. Previous demonstrations of the repetition code in various physical systems have circumvented this requirement, detecting errors at the cost of decoding the logical qubit. Using five superconducting qubits in circuit quantum electrodynamics, we demonstrate quantum bit-flip error detection at the logical-qubit level by stabiliser measurements for the first time. These stabilisers are assessed by their ability to generate GHZ-type entanglement: projecting a maximal superposition state into the subspaces being stabilised, while maintaining the coherence within each. To further characterise the error detection, we intentionally apply errors on all qubits and assess the fidelities both in the encoded subspace and at the logical-qubit level. Although current fidelities of the stabiliser measurements preclude improvements by error detection over idling, this demonstration is a critical step towards larger codes based on stabiliser measurements in the paradigm of FTQC.
Advisors/Committee Members: DiCarlo, Leonardo (advisor), Dood, Michiel de (advisor).
Subjects/Keywords: Circuit QED; Quantum error correction; Stabiliser measurements
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APA (6th Edition):
Huang, M. (2015). Quantum Error Detection by Stabiliser Measurements in a Logical Qubit. (Masters Thesis). Leiden University. Retrieved from http://hdl.handle.net/1887/43979
Chicago Manual of Style (16th Edition):
Huang, Mengzi. “Quantum Error Detection by Stabiliser Measurements in a Logical Qubit.” 2015. Masters Thesis, Leiden University. Accessed March 07, 2021.
http://hdl.handle.net/1887/43979.
MLA Handbook (7th Edition):
Huang, Mengzi. “Quantum Error Detection by Stabiliser Measurements in a Logical Qubit.” 2015. Web. 07 Mar 2021.
Vancouver:
Huang M. Quantum Error Detection by Stabiliser Measurements in a Logical Qubit. [Internet] [Masters thesis]. Leiden University; 2015. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1887/43979.
Council of Science Editors:
Huang M. Quantum Error Detection by Stabiliser Measurements in a Logical Qubit. [Masters Thesis]. Leiden University; 2015. Available from: http://hdl.handle.net/1887/43979
3.
Ballance, Timothy George.
An ultraviolet fibre-cavity for strong ion-photon interaction.
Degree: PhD, 2017, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/267687
► We investigate the coupling of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single…
(more)
▼ We investigate the coupling of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single photons at a high rate into a single spatial mode. Using our apparatus, we have demonstrated the highest atom-cavity coupling rate achieved with a single ion by an order of magnitude. When the ion is continuously excited, we observe phase-sensitive correlations between emission into free-space and into the cavity mode, which can be explained by a cavity induced back-action effect on a driven dipole. We demonstrate coherent manipulation of a hyperfine qubit and ultra-short optical π rotations, which are essential tools for creation and detection of spin-photon entanglement.
To this end, we have developed optical fibre-based Fabry-Perot cavities in the ultraviolet spectral range. These cavities operate near the primary dipole transition of Yb at 370 nm, and allow us to couple a pure atomic two-level system offered by a single trapped ion to the cavity mode.
A new Paul trap apparatus in an ultra-high vacuum chamber has been built which allows for the integration of these cavities at very small ion-mirror separations. In order for independent operation of the trap, a compact system of diode lasers has been built which are stabilised to low-drift optical reference cavities. Coherent control of the hyperfine qubit in Yb 171 is achieved through application of microwave radiation, and ultra-short optical π rotations are performed with resonant light pulses derived from a frequency-doubled mode-locked titanium-sapphire laser. The experiment is controlled through a system of hardware and software which has been developed in a modular fashion and will allow for efficient control on the nanosecond time-scale when several such systems are interconnected.
The success of our system opens the door to future experiments with trapped ions which will reach the strong coupling regime with a single ion. Furthermore, when operated in the fast-cavity regime, systems based on our approach will enable high-efficiency collection of photons from the ion into the single mode of an optical fibre. These systems will allow for the generation of distributed entanglement and will prove ideal as nodes in a larger quantum network of trapped ions.
Subjects/Keywords: trapped ions; cavity qed; quantum information
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APA (6th Edition):
Ballance, T. G. (2017). An ultraviolet fibre-cavity for strong ion-photon interaction. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/267687
Chicago Manual of Style (16th Edition):
Ballance, Timothy George. “An ultraviolet fibre-cavity for strong ion-photon interaction.” 2017. Doctoral Dissertation, University of Cambridge. Accessed March 07, 2021.
https://www.repository.cam.ac.uk/handle/1810/267687.
MLA Handbook (7th Edition):
Ballance, Timothy George. “An ultraviolet fibre-cavity for strong ion-photon interaction.” 2017. Web. 07 Mar 2021.
Vancouver:
Ballance TG. An ultraviolet fibre-cavity for strong ion-photon interaction. [Internet] [Doctoral dissertation]. University of Cambridge; 2017. [cited 2021 Mar 07].
Available from: https://www.repository.cam.ac.uk/handle/1810/267687.
Council of Science Editors:
Ballance TG. An ultraviolet fibre-cavity for strong ion-photon interaction. [Doctoral Dissertation]. University of Cambridge; 2017. Available from: https://www.repository.cam.ac.uk/handle/1810/267687
4.
LEE CHERN HUI.
Cavity QED with Rydberg Excitations.
Degree: 2014, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/113318
Subjects/Keywords: cavity qed; Rydberg
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APA (6th Edition):
HUI, L. C. (2014). Cavity QED with Rydberg Excitations. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/113318
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
HUI, LEE CHERN. “Cavity QED with Rydberg Excitations.” 2014. Thesis, National University of Singapore. Accessed March 07, 2021.
http://scholarbank.nus.edu.sg/handle/10635/113318.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
HUI, LEE CHERN. “Cavity QED with Rydberg Excitations.” 2014. Web. 07 Mar 2021.
Vancouver:
HUI LC. Cavity QED with Rydberg Excitations. [Internet] [Thesis]. National University of Singapore; 2014. [cited 2021 Mar 07].
Available from: http://scholarbank.nus.edu.sg/handle/10635/113318.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
HUI LC. Cavity QED with Rydberg Excitations. [Thesis]. National University of Singapore; 2014. Available from: http://scholarbank.nus.edu.sg/handle/10635/113318
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Australian National University
5.
Zhong, Janet.
Topology and Interactions in a Qubit Array Coupled to a Waveguide
.
Degree: 2019, Australian National University
URL: http://hdl.handle.net/1885/202446
► Waveguide quantum electrodynamic (waveguide QED) systems (arrays of qubits coupled to a waveguide) can exhibit a vast array of phenomena from collective effects, non-trivial topology…
(more)
▼ Waveguide quantum electrodynamic (waveguide QED) systems (arrays
of qubits coupled to a waveguide) can exhibit a vast array of
phenomena from collective effects, non-trivial topology to novel
localisation effects. This thesis is the first study of a
long-range coupled topological waveguide QED system. The
existence of topological edge states for when one photon is
incident on a spatially modulated qubit array is numerically
verified and the results are analogous to a photonic crystal
set-up in Ref. [1]. This thesis then goes beyond the single
photon regime to consider the effect of interactions for when two
photons are incident in the qubit array. Bound photon pairs and
bound pair edge states are readily observed. Numerical results
suggest that the bound pair edge states are topologically
non-trivial, however, a topological invariant should be
calculated before making stronger conclusive statements. Even
more interestingly, the two-photon qubit array can also exhibit a
self-induced localised state. This appears to be a completely
unexplored effect that can connect many body physics, collective
effects as well as topological properties.
The exotic topological properties of these waveguide QED systems
are promising developments in the growing field of quantum
topological photonics which is said to have large potential for
quantum computing technologies. The novel localised states also
reveals that the physics of waveguide QED systems are richer than
expected with many unexplored
phenomena.
Subjects/Keywords: topological photonics;
quantum optics;
waveguide QED;
qubit
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APA ·
Chicago ·
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Export
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Manager
APA (6th Edition):
Zhong, J. (2019). Topology and Interactions in a Qubit Array Coupled to a Waveguide
. (Thesis). Australian National University. Retrieved from http://hdl.handle.net/1885/202446
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhong, Janet. “Topology and Interactions in a Qubit Array Coupled to a Waveguide
.” 2019. Thesis, Australian National University. Accessed March 07, 2021.
http://hdl.handle.net/1885/202446.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhong, Janet. “Topology and Interactions in a Qubit Array Coupled to a Waveguide
.” 2019. Web. 07 Mar 2021.
Vancouver:
Zhong J. Topology and Interactions in a Qubit Array Coupled to a Waveguide
. [Internet] [Thesis]. Australian National University; 2019. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1885/202446.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhong J. Topology and Interactions in a Qubit Array Coupled to a Waveguide
. [Thesis]. Australian National University; 2019. Available from: http://hdl.handle.net/1885/202446
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
6.
Ballance, Timothy George.
An ultraviolet fibre-cavity for strong ion-photon interaction.
Degree: PhD, 2017, University of Cambridge
URL: https://doi.org/10.17863/CAM.13621
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725515
► We investigate the coupling of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single…
(more)
▼ We investigate the coupling of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single photons at a high rate into a single spatial mode. Using our apparatus, we have demonstrated the highest atom-cavity coupling rate achieved with a single ion by an order of magnitude. When the ion is continuously excited, we observe phase-sensitive correlations between emission into free-space and into the cavity mode, which can be explained by a cavity induced back-action effect on a driven dipole. We demonstrate coherent manipulation of a hyperfine qubit and ultra-short optical Ï€ rotations, which are essential tools for creation and detection of spin-photon entanglement. To this end, we have developed optical fibre-based Fabry-Perot cavities in the ultraviolet spectral range. These cavities operate near the primary dipole transition of Yb at 370 nm, and allow us to couple a pure atomic two-level system offered by a single trapped ion to the cavity mode. A new Paul trap apparatus in an ultra-high vacuum chamber has been built which allows for the integration of these cavities at very small ion-mirror separations. In order for independent operation of the trap, a compact system of diode lasers has been built which are stabilised to low-drift optical reference cavities. Coherent control of the hyperfine qubit in Yb 171 is achieved through application of microwave radiation, and ultra-short optical Ï€ rotations are performed with resonant light pulses derived from a frequency-doubled mode-locked titanium-sapphire laser. The experiment is controlled through a system of hardware and software which has been developed in a modular fashion and will allow for efficient control on the nanosecond time-scale when several such systems are interconnected. The success of our system opens the door to future experiments with trapped ions which will reach the strong coupling regime with a single ion. Furthermore, when operated in the fast-cavity regime, systems based on our approach will enable high-efficiency collection of photons from the ion into the single mode of an optical fibre. These systems will allow for the generation of distributed entanglement and will prove ideal as nodes in a larger quantum network of trapped ions.
Subjects/Keywords: 539.7; trapped ions; cavity qed; quantum information
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ballance, T. G. (2017). An ultraviolet fibre-cavity for strong ion-photon interaction. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.13621 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725515
Chicago Manual of Style (16th Edition):
Ballance, Timothy George. “An ultraviolet fibre-cavity for strong ion-photon interaction.” 2017. Doctoral Dissertation, University of Cambridge. Accessed March 07, 2021.
https://doi.org/10.17863/CAM.13621 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725515.
MLA Handbook (7th Edition):
Ballance, Timothy George. “An ultraviolet fibre-cavity for strong ion-photon interaction.” 2017. Web. 07 Mar 2021.
Vancouver:
Ballance TG. An ultraviolet fibre-cavity for strong ion-photon interaction. [Internet] [Doctoral dissertation]. University of Cambridge; 2017. [cited 2021 Mar 07].
Available from: https://doi.org/10.17863/CAM.13621 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725515.
Council of Science Editors:
Ballance TG. An ultraviolet fibre-cavity for strong ion-photon interaction. [Doctoral Dissertation]. University of Cambridge; 2017. Available from: https://doi.org/10.17863/CAM.13621 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725515
Colorado School of Mines
7.
LaCount, Michael D.
Energy pooling upconversion in free space and optical cavities.
Degree: PhD, Physics, 2017, Colorado School of Mines
URL: http://hdl.handle.net/11124/170985
► The ability to efficiently convert the wavelength of light has value in a wide range of disciplines that include the fields of photovoltaics, plant growth,…
(more)
▼ The ability to efficiently convert the wavelength of light has value in a wide range of disciplines that include the fields of photovoltaics, plant growth, optics and medicine. The processes by which such transformations are carried out are known as upconversions and downconversions. There are several ways to up/down convert light, each with its own attributes, issues, and competing mechanisms. Most are associated with one-body or two-body processes. Three-body dynamics are also possible though, going by the names of quantum cutting (downconversion) and energy pooling (upconversion). These use virtual excited electronic states to mediate conversions as has been experimentally realized using lanthanide ions embedded in wide bandgap materials. The use of lanthanides to convert light is not ideal due to their relative scarcity, toxicity, and the limited range of light frequencies that can be absorbed and emitted. Organic molecules, on the other hand, are typically non-toxic, are made up of abundant elements, and can be designed with tailored spectral properties. At issue is whether or not they can be used to carry out efficient energy pooling, the central question to be answered in this thesis. The research presented here draws on a perturbative quantum electrodynamics framework previously established for generic energy pooling. It was used to develop a computational methodology for determining the rate of energy pooling and its competing processes. This, in turn, draws on a combination of time-dependent density functional theory, quantum electrodynamics, and perturbation theory to generate the requisite material property data. This computational model was applied to two test systems consisting of stilbene-fluorescein and hexabenzocoronene-oligothiophene. The stilbene-fluorescein system was found to have a maximum energy pooling rate efficiency (as compared to competing processes) of 17% and the hexabenzocoronene-oligothiophene system was found to have a maximum energy pooling rate efficiency of 99%. This demonstrates that the energy pooling rate can be made faster than its competing processes. Based on the results of this study, a set of design rules was developed to optimize the rate efficiency of energy pooling. Prior to this research, no attempt had been made to determine if energy pooling could be made to out-pace competing processes – i.e. whether or not a molecular system could be designed to utilize energy pooling as an efficient means of upconversion. This initial investigation was part of a larger effort involving a team of researchers at the University of Colorado, Boulder and at the National Renewable Energy Laboratory. After establishing our computational proof-of-concept, we collectively used the new design rules to select an improved system for energy pooling. This consisted of rhodamine 6G and stilbene-420. These molecules were fabricated into a thin film, and the maximum internal quantum yield was measured to be 36% under sufficiently high intensity light. To further increase the efficiency of energy…
Advisors/Committee Members: Lusk, Mark T. (advisor), Carr, Lincoln D. (committee member), Durfee, Charles G. (committee member), Sellinger, Alan (committee member).
Subjects/Keywords: cavity; perturbation; upconversion; kinetic; Ab initio; QED
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APA ·
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Manager
APA (6th Edition):
LaCount, M. D. (2017). Energy pooling upconversion in free space and optical cavities. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170985
Chicago Manual of Style (16th Edition):
LaCount, Michael D. “Energy pooling upconversion in free space and optical cavities.” 2017. Doctoral Dissertation, Colorado School of Mines. Accessed March 07, 2021.
http://hdl.handle.net/11124/170985.
MLA Handbook (7th Edition):
LaCount, Michael D. “Energy pooling upconversion in free space and optical cavities.” 2017. Web. 07 Mar 2021.
Vancouver:
LaCount MD. Energy pooling upconversion in free space and optical cavities. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2017. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11124/170985.
Council of Science Editors:
LaCount MD. Energy pooling upconversion in free space and optical cavities. [Doctoral Dissertation]. Colorado School of Mines; 2017. Available from: http://hdl.handle.net/11124/170985
Texas A&M University
8.
You, Jieyu.
Waveguide QED in the Squeezed Vacuum.
Degree: PhD, Physics, 2020, Texas A&M University
URL: http://hdl.handle.net/1969.1/191931
► The well-known Purcell effect shows that the spontaneous decay rate of an emitter can be affected by the electromagnetic environment with which the emitters interact.…
(more)
▼ The well-known Purcell effect shows that the spontaneous decay rate of an emitter can be affected by the electromagnetic environment with which the emitters interact. One of the most famous and popular examples is the squeezed vacuum. Although the squeezed vacuum does not change the density of states of the electromagnetic modes, it can modify the decay rate as well as the dephasing rate of the emitters. The interaction between a single atom and the squeezed vacuum has been widely studied, while only a few publications deal with the multiple-atom system. Despite the fact that the dipole-dipole interaction induced by ordinary vacuum depends on the relative separation of atoms, there are only a few papers studying the impact of atomic separation in the squeezed vacuum. In this dissertation, we show that the interaction induced by the squeezed vacuum depends on the center of mass positions of the atoms, which is essentially different from that in the ordinary vacuum. We also illustrate how to choose the coordinate system to make the center of mass position reasonable and well-defined.
Although the squeezed vacuum theory has been widely studied, it is impractical to generate a broadband squeezed vacuum reservoir which squeezes all modes in the 3-dimensional (3D) space. Recently, photon transport in a one-dimensional (1D) waveguide coupled to quantum emitters (well known as "waveguide-
QED") has attracted much attention due to its possible applications in quantum device and quantum information. In contrast to the 3D case, squeezing in 1D is more experimentally feasible. Suppression of the spontaneous decay rate and the linewidth of the resonance fluorescence atom has been experimentally demonstrated in a 1D microwave transmission line coupled to a single artificial atom. However many-body interaction in a 1D waveguide
QED system coupled to the squeezed vacuum has still not yet been studied. In this dissertation, we apply our theory to the 1D waveguide-
QED system with the squeezed reservoir. Contrary to the traditional result that the dephasing rate of a single atom is a constant, our calculation shows that the dephasing rate is actually position-dependent. As the dipole-dipole interaction is involved in the atomic system, both the atomic separation and center of mass position have impacts on the decay rate, dephasing rate, and the emitted resonance fluorescence spectrum. Moreover, the stationary maximum entangled NOON state can be achieved if atomic transition frequency is resonant with the center frequency of the squeezed vacuum.
In light of the fact that two qubits can be treated as a whole to be a four level atomic system, we also study the dynamics of Ξ-type atoms driven by a squeezed vacuum. We get the interesting result that the atomic system’s steady state is a pure state, and a complete population inversion can occur when the coupling between the atomic dipole and the squeezed vacuum satisfy some certain conditions. We also mathematically prove that the steady state of a many-body system is nothing else but the…
Advisors/Committee Members: Zubairy, Muhammad Suhail (advisor), Sokolov, Alexei (committee member), Zheltikov, Aleksei (committee member), Hemmer, Philip (committee member).
Subjects/Keywords: squeezed vacuum; waveguide; QED; many-body system
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APA ·
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Manager
APA (6th Edition):
You, J. (2020). Waveguide QED in the Squeezed Vacuum. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/191931
Chicago Manual of Style (16th Edition):
You, Jieyu. “Waveguide QED in the Squeezed Vacuum.” 2020. Doctoral Dissertation, Texas A&M University. Accessed March 07, 2021.
http://hdl.handle.net/1969.1/191931.
MLA Handbook (7th Edition):
You, Jieyu. “Waveguide QED in the Squeezed Vacuum.” 2020. Web. 07 Mar 2021.
Vancouver:
You J. Waveguide QED in the Squeezed Vacuum. [Internet] [Doctoral dissertation]. Texas A&M University; 2020. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1969.1/191931.
Council of Science Editors:
You J. Waveguide QED in the Squeezed Vacuum. [Doctoral Dissertation]. Texas A&M University; 2020. Available from: http://hdl.handle.net/1969.1/191931
Johannes Gutenberg Universität Mainz
9.
Lochmann, Matthias.
Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+.
Degree: 2013, Johannes Gutenberg Universität Mainz
URL: http://ubm.opus.hbz-nrw.de/volltexte/2013/3492/
► Die theoretische und experimentelle Untersuchung von wasserstoffähnlichen Systemen hat in den letzten hundert Jahren immer wieder sowohl die experimentelle als auch die theoretische Physik entscheidend…
(more)
▼ Die theoretische und experimentelle Untersuchung von wasserstoffähnlichen Systemen hat in den letzten hundert Jahren immer wieder sowohl die experimentelle als auch die theoretische Physik entscheidend vorangebracht. Formulierung und Test der Quantenelektrodynamik (QED) standen und stehen in engen Zusammenhang mit der Untersuchung wasserstoffähnlicher Systeme. Gegenwärtig sind besonders wasserstoffähnliche Systeme schwerer Ionen von Interesse, um die QED in den extrem starken Feldern in Kernnähe zu testen. Laserspektroskopische Messungen der Hyperfeinstrukturaufspaltung des Grundzustandes bieten eine hohe Genauigkeit, ihre Interpretation wird jedoch durch die Unsicherheit in der Größe der Kernstruktureffekte erschwert. Beseitigt werden können diese durch die Kombination der Aufspaltung in wasserstoff- und lithiumähnlichen Ionen des gleichen Nuklids. In den letzten zwei Jahrzehnten scheiterten mehrere dadurch motivierte Versuche, den HFS-Ãœbergang in lithiumähnlichen 209Bi80+ zu finden. Im Rahmen dieser Arbeit wurde kollineare Laserspektroskopie bei etwa 70% der Lichtgeschwindigkeit an 209Bi82+ und 209Bi80+ -Ionen im Experimentier- Speicherring an der GSI in Darmstadt durchgeführt. Dabei wurde der Ãœbergang im lithiumähnlichen Bismut erstmals beobachtet und dessen Ãœbergangswellenlänge zu 1554,74(74) nm bestimmt. Ein eigens für dieses Experiment optimiertes Fluoreszenz-Nachweissystem stellte dabei die entscheidende Verbesserung gegenüber den gescheiterten Vorgängerexperimenten dar. Der Wellenlängenfehler ist dominiert von der Unsicherheit der Ionengeschwindigkeit, die für die Transformation in das Ruhesystem der Ionen entscheidend ist. Für deren Bestimmung wurden drei Ansätze verfolgt: Die Geschwindigkeit wurde aus der Elektronenkühlerspannung bestimmt, aus dem Produkt von Orbitlänge und Umlauffrequenz und aus dem relativistischen Dopplereffekt unter Annahme der Korrektheit des früher bestimmten Ãœberganges in wasserstoffähnlichen Bismut. Die Spannungskalibration des Elektronenkühlers wurde im Rahmen dieser Arbeit erstmals kritisch evaluiert und bislang unterschätzte systematische Unsicherheiten aufgezeigt, die derzeit einen aussagekräftigen QED-Test verhindern. Umgekehrt konnte unter Verwendung der QED-Berechnungen eine Ionengeschwindigkeit berechnet werden, die ein genaueres und konsistenteres Resultat für die Ãœbergangswellenlängen beider Ionenspezies liefert. Daraus ergibt sich eine Diskrepanz zu dem früher bestimmten Wert des Ãœberganges in wasserstoffähnlichen Bismut, die es weiter zu untersuchen gilt.
Theoretical and experimental investigations of hydrogenlike systems have repeatedly advanced both experimental and theoretical physics over the past century. There was a particular fruitful interplay between establishing and testing quantum electrodynamics (QED) and investigation of hydrogenlike systems. Currently, especially hydrogenlike systems consisting of heavy ions are of special interest, as they provide the possibility to check QED in the extremely strong fields near the nucleus. Measuring the ground state…
Subjects/Keywords: Laserspektroskopie, ESR, Bismut, lithiumähnlich, QED-Test; laser spectroscopy, ESR, bismuth, lithium-like, QED-test; Physics
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APA (6th Edition):
Lochmann, M. (2013). Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2013/3492/
Chicago Manual of Style (16th Edition):
Lochmann, Matthias. “Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+.” 2013. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 07, 2021.
http://ubm.opus.hbz-nrw.de/volltexte/2013/3492/.
MLA Handbook (7th Edition):
Lochmann, Matthias. “Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+.” 2013. Web. 07 Mar 2021.
Vancouver:
Lochmann M. Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2013. [cited 2021 Mar 07].
Available from: http://ubm.opus.hbz-nrw.de/volltexte/2013/3492/.
Council of Science Editors:
Lochmann M. Laserspektroskopie der Grundzustands-Hyperfeinstruktur des lithiumähnlichen 209 Bi 80+. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2013. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2013/3492/
10.
M. Bina.
OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL.
Degree: 2010, Università degli Studi di Milano
URL: http://hdl.handle.net/2434/150134
► The object of this PhD Thesis is light and matter quantum interaction including studies on cavity and circuit quantum electrodynamics (CQED and cQED), quantum information…
(more)
▼ The object of this PhD Thesis is light and matter quantum interaction including studies
on cavity and circuit quantum electrodynamics (CQED and cQED), quantum information theory and entanglement dynamics in open systems. In recent years both theoretical and experimental efforts have been devoted to study problems regarding the transfer of quantum correlations, quantum memories, entanglement protection against decoherence and new regimes accessible in cQED. One of the fundamental model underlying these topics is the well known Jaynes-Cummings (JC) one for light-matter interaction, introduced in quantum optics already in 1963. This paradigmatic model describes the coherent exchange of a single excitation between a qubit (a two-level system) and a mode of a quantized harmonic
oscillator. The JC model describes a lot of purely quantum effects such as Rabi oscillations and generation of entangled quantum states, which were confirmed by several sophisticated experiments in CQED. This model has been then applied in many other frameworks. Analytical results can be derived only under the so-called rotating wave approximation (RWA), which allows to neglect the energy contributions coming from the counter-rotating terms, which describe the simultaneous excitation (or de-excitation) of the qubit and the field mode. In this Thesis a first interesting investigation, based on the JC model, is related to the realization of quantum memories. The main aspect is the transfer of generic quantum entangled states of a propagating radiation to some qubits, such as two-level atoms placed in separated optical cavities. Generalizing previous results for bipartite entangled systems, I investigated the more complex case of tripartite systems, where the very quantification of entanglement is still an open problem. This issue is broadened to open systems in contact with a common environment which induces decoherence effects unavoidable in realistic implementations. The main result of this analysis is that it is possible to map in an optimal way a quantum state from radiation to qubits in the unitary dynamics, and even in the presence of a dissipative environment a significative amount of entanglement can be transferred. This study has been carried on with either theoretical calculations or numerical simulations performed adopting
the powerful Monte Carlo wave function method. A second important problem for quantum memories faced in this PhD Thesis, regards the protection of qubits entanglement for long enough times in order to implement quantum information tasks. A possible way to obtain this goal is to add an external coherent field driving two or more two-level atoms interacting with a common mode of a cavity electromagnetic field. In fact it is possible to demonstrate that, under certain conditions, an effective Hamiltonian of the whole system involves, together with the familiar JC terms, also the counter-rotating ones. The main feature that comes out from this analysis is the possibility to freeze, during system dynamics, peculiar…
Advisors/Committee Members: tutor: Federico Casagrande, tutor: Matteo Paris, coordinatore: Marco Bersanelli, referee: Luigi Lugiato, CASAGRANDE, FEDERICO, BERSANELLI, MARCO RINALDO FEDELE.
Subjects/Keywords: quantum optics; entanglement; quantum information; cavity QED; circuit QED; Settore FIS/03 - Fisica della Materia
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APA (6th Edition):
Bina, M. (2010). OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL. (Thesis). Università degli Studi di Milano. Retrieved from http://hdl.handle.net/2434/150134
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bina, M.. “OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL.” 2010. Thesis, Università degli Studi di Milano. Accessed March 07, 2021.
http://hdl.handle.net/2434/150134.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bina, M.. “OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL.” 2010. Web. 07 Mar 2021.
Vancouver:
Bina M. OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL. [Internet] [Thesis]. Università degli Studi di Milano; 2010. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/2434/150134.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bina M. OPEN QUANTUM SYSTEMS DYNAMICS WITHIN AND BEYOND THE JAYNES-CUMMINGS MODEL. [Thesis]. Università degli Studi di Milano; 2010. Available from: http://hdl.handle.net/2434/150134
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Johansson, Petter.
Pair Annihilation in a Laser Pulse.
Degree: Physics, 2011, Umeå University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46816
► The thesis analyses the process of pair annihilation into one photon in a laser pulse. The theory of how to include pulse shapes in…
(more)
▼ The thesis analyses the process of pair annihilation into one photon in a laser pulse. The theory of how to include pulse shapes in Strong Field QED and the resulting cross section is presented. The cross section is calculated and estimated for lasers of ELI and XFEL facilites.
It is found that the effect may be experimentally verifiable at high frequency XFEL facilities for very finely tuned particle kinematics, but negligible at high intensity optical laser facilities such as ELI.
Subjects/Keywords: Pair Annihilation; Laser Pulses; XFEL; ELI; Strong Field QED; Intense Field QED
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APA (6th Edition):
Johansson, P. (2011). Pair Annihilation in a Laser Pulse. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46816
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Johansson, Petter. “Pair Annihilation in a Laser Pulse.” 2011. Thesis, UmeÃ¥ University. Accessed March 07, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46816.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Johansson, Petter. “Pair Annihilation in a Laser Pulse.” 2011. Web. 07 Mar 2021.
Vancouver:
Johansson P. Pair Annihilation in a Laser Pulse. [Internet] [Thesis]. Umeå University; 2011. [cited 2021 Mar 07].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46816.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Johansson P. Pair Annihilation in a Laser Pulse. [Thesis]. Umeå University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46816
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Johannes Gutenberg Universität Mainz
12.
Sturm, Sven.
The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics.
Degree: 2011, Johannes Gutenberg Universität Mainz
URL: http://ubm.opus.hbz-nrw.de/volltexte/2012/3108/
► This thesis describes the ultra-precise determination of the g-factor of the electron bound to hydrogenlike 28Si13+. The experiment is based on the simultaneous determination of…
(more)
▼ This thesis describes the ultra-precise determination of the g-factor of the electron bound to hydrogenlike 28Si13+. The experiment is based on the simultaneous determination of the cyclotron- and Larmor frequency of a single ion, which is stored in a triple Penning-trap setup. The continuous Stern-Gerlach effect is used to couple the spin of the bound electron to the motional frequencies of the ion via a magnetic bottle, which allows the non-destructive determination of the spin state. To this end, a highly sensitive, cryogenic detection system was developed, which allowed the direct, non-destructive detection of the eigenfrequencies with the required precision.rnThe development of a novel, phase sensitive detection technique finally allowed the determination of the g-factor with a relative accuracy of 40 ppt, which was previously inconceivable. The comparison of the hereby determined value with the value predicted by quantumelectrodynamics (QED) allows the verification of the validity of this fundamental theory under the extreme conditions of the strong binding potential of a highly charged ion. The exact agreement of theory and experiment is an impressive demonstration of the exactness of QED. The experimental possibilities created in this work will allow in the near future not only further tests of theory, but also the determination of the mass of the electron with a precision that exceeds the current literature value by more than an order of magnitude.
In dieser Arbeit wird die ultra-hochpr¨azise experimentelle Bestimmung des g-Faktors des in wasserstoffähnlichem 28Si13+ gebundenen Elektrons beschrieben. Das Experiment basiert auf der gleichzeitigen Bestimmung der Zyklotron- und Larmorfrequenz eines einzelnen Ions, dass in einem dreifach-Penningfallensystem gespeichert ist. Dabei wird der kontinuierliche Stern-Gerlach Effekt genutzt, der einen nichtdestruktiven Nachweis des Spinzustandes durch eine Kopplung des Spins des gebundenen Elektrons an die Bewegungsfrequenzen des Ions mittels einer magnetischen Flasche ermöglicht. Dazu wurde ein hochempfindliches, kryogenes Nachweissystem entwickelt, das eine direkte, nichtdestruktive Messung der Eigenfrequenzen mit der erforderlichen Präzision erlaubt. Die Entwicklung eines neuartigen, phasensensitiven Nachweisverfahrens erlaubte schließlich die Bestimmung des g-Faktors mit einer bisher unerreichbaren relativen Genauigkeit von 40 ppt. Der Vergleich des so ermittelten Wertes mit dem von der Quantenelektrodynamik (QED) vorhergesagten erlaubt die Ãœberprüfung der Gültigkeit dieser fundamentalen Theorie unter den extremen Bedingungen des starken Bindungspotentials des hochgeladenen Ions.rnDie exakte Ãœbereinstimmung von Theorie und Experiment ist eine eindrucksvollernDemonstration der Genauigkeit der QED. Die in dieser Arbeit geschaffenen experimentellen Möglichkeiten erlauben in naher Zukunft nicht nur weitergehendernTests der Theorie, sondern auch die Bestimmung der Masse des Elektrons mit einerrnGenauigkeit, die den bisherigen Literaturwert um mehr als eine…
Subjects/Keywords: g-Faktor, Elektron, QED Test, gebundenes Elektron, gebundener Zustand; g-factor, electron, QED test, bound electron, bound-state; Physics
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APA (6th Edition):
Sturm, S. (2011). The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2012/3108/
Chicago Manual of Style (16th Edition):
Sturm, Sven. “The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics.” 2011. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 07, 2021.
http://ubm.opus.hbz-nrw.de/volltexte/2012/3108/.
MLA Handbook (7th Edition):
Sturm, Sven. “The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics.” 2011. Web. 07 Mar 2021.
Vancouver:
Sturm S. The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2011. [cited 2021 Mar 07].
Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3108/.
Council of Science Editors:
Sturm S. The g-factor of the electron bound in 28 Si 13+ : the most stringent test of bound-state quantum electrodynamics. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2011. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3108/
13.
Portelli, Antonin.
Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin.
Degree: Docteur es, Physique Théorique et Mathématique, 2012, Aix Marseille Université
URL: http://www.theses.fr/2012AIXM4110
► Depuis les années 1930, on sait que le noyau des atomes est composé de deux types de particules: les protons et les neutrons. Ces deux…
(more)
▼ Depuis les années 1930, on sait que le noyau des atomes est composé de deux types de particules: les protons et les neutrons. Ces deux particules sont très similaires: d'une part le neutron est subtilement plus lourd (un pour mille) que le proton et d'autre part le proton porte une charge électrique positive tandis que le neutron est neutre. La petite différence de masse entre le neutron et le proton fourni l'énergie suffisante pour autoriser désintégration où un neutron se désintègre en un proton en émettant un électron et un anti-neutrino électronique. Aussi, le fait que le proton ne se désintègre pas assure la stabilité de l'atome d'hydrogène. De plus, on sait empiriquement que les paramètres de la désintégration déterminent la composition des noyaux d'atomes stables plus lourds que l'hydrogène. Il est donc raisonnable de penser que si la différence de masse entre le neutron et le proton était de signe opposé ou seulement légèrement différente, l'Univers visible serait surement très différent de celui que l'on connait. Il est donc essentiel de comprendre l'origine de cette différence de masse à partir des principes premiers de la physique. C'est à ce problème, et à des problèmes liés à celui-ci, qu'essaye de répondre ce travail. Dans la compréhension actuelle de la physique, les neutrons et les protons sont des particules composées de particules élémentaires appelées quark up (symbole u) et quark down (symbole d). Le proton est un état lié uud et le neutron est un état lié udd. Les quarks up et down sont deux particules similaires: elles sont toutes deux légères (de l'ordre de quelques MeV) et leurs charges électriques sont différentes.
.
Advisors/Committee Members: Lellouch, Laurent (thesis director).
Subjects/Keywords: Physique des particules; Quantique; Chromodynamique; Électrodynamique; Qcd; Qed; Isospin; Hadrons; Baryons; Particle physics; Quantum; Chromodynamics; Electrodynamics; Qcd; Qed; Isospin; Hadrons; Baryons
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APA (6th Edition):
Portelli, A. (2012). Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin. (Doctoral Dissertation). Aix Marseille Université. Retrieved from http://www.theses.fr/2012AIXM4110
Chicago Manual of Style (16th Edition):
Portelli, Antonin. “Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin.” 2012. Doctoral Dissertation, Aix Marseille Université. Accessed March 07, 2021.
http://www.theses.fr/2012AIXM4110.
MLA Handbook (7th Edition):
Portelli, Antonin. “Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin.” 2012. Web. 07 Mar 2021.
Vancouver:
Portelli A. Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin. [Internet] [Doctoral dissertation]. Aix Marseille Université 2012. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2012AIXM4110.
Council of Science Editors:
Portelli A. Nonpertubative quantum chromodynamics and isospin symmetry breaking : Chromodynamique quantique non perturbative et brisures de la symétrie d'Isospin. [Doctoral Dissertation]. Aix Marseille Université 2012. Available from: http://www.theses.fr/2012AIXM4110
14.
Bian, Guojie.
Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms.
Degree: Docteur es, Physique, 2019, Sorbonne université
URL: http://www.theses.fr/2019SORUS179
► Nous avons effectué des calculs Dirac-Fock multi-configuration des énergies de transitions de structure fine 1s²2p²PJ-1s²2s²S1/2, J=1/2, 3/2, les transitions à partir d'états excités en couche…
(more)
▼ Nous avons effectué des calculs Dirac-Fock multi-configuration des énergies de transitions de structure fine 1s²2p²PJ-1s²2s²S1/2, J=1/2, 3/2, les transitions à partir d'états excités en couche internes 1s2s2p²PJ-1s²2s²S1/2, J=1/2, 3/2 et 1s2s2p4PJ-1s²2s²S1/2, J=1/2, 3/2, 5/2, et les transitions Auger à partir de ces mêmes états 1s2s2p4PJ- 1s2 1S0, J=1/2, 3/2 dans la séquence isoélectronique du lithium, pour des ions de numéro atomique 10 ≤ Z ≤ 96. Des corrections électrodynamiques quantiques avec modèle d'opérateur efficace et des corrections de corrélation électronique sont incluses dans les fonctions d'onde de Dirac avec une taille nucléaire finie. Des corrections de polarisation de Breit et de polarisation du vide de tous les ordres sont également incluses dans le calcul, avec une fonction d'onde d'ensemble actif entièrement optimisée. Des comparaisons approfondies entre les résultats théoriques existants et l'expérience sont effectuées. Nous évaluons également les paramètres nucléaires qui minimisent l'écart pondéré entre la théorie et l'expérience dans les modèles muoniques 208Pb avec des modèles Fermi à deux paramètres et Gauss à trois paramètres. Nous avons obtenu r = 5.5057 fm dans le modèle de Fermi et r = 5.5031 dans le modèle de Gauss par ajustement polynomial. Nous analysons également les contributions individuelles de 226Ra et 248Cm muoniques en utilisant la même prescription de corrections exactes de QED pour les expériences à venir.
We have performed multi-configuration Dirac-Fock calculations of the transition energies in the transitions of 1s²2p²PJ-1s²2s²S1/2, J=1/2, 3/2, core-excited transitions of 1s2s2p²PJ-1s²2s²S1/2, J=1/2, 3/2 and 1s2s2p4PJ-1s²2s²S1/2, J=1/2, 3/2, 5/2, and Auger transition energies of 1s2s2p2PJ-1s2 1S0 and 1s2s2p4PJ- 1s2 1S0, J=1/2,3/2 in the lithium isoelectronic sequence for low- to high-Z ions (Z=10-96). Quantum-electrodynamic corrections with effective operator model and electronic correlation corrections are included in Dirac wave functions with finite nuclear size. All-order Breit and vacuum polarization corrections are also included in the calculation, with a fully optimized active set wavefunction. Extensive comparisons between existing theorical results and experiment are performed. We also evaluate nuclear parameters that minimize the weighted theory-experiment discrepancy in muonic 208Pb with two-parameter Fermi and three-parameter Gauss models. We obtain r=5.5057 fm in the Fermi model and r=5.5031 in Gauss model by polynomial-fitting. We also analyze the individual contributions of muonic 226Ra and 248Cm using the same prescription of exact QED correction for the upcoming experiments.
Advisors/Committee Members: Indelicato, Paul (thesis director).
Subjects/Keywords: Méthode MCDF; QED; Énergie de transition; Atomes muoniques; Rayons nucléaires; MCDF Method; QED; Transition energy; Muonic Atoms; Nuclear rays; 539.7
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APA ·
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APA (6th Edition):
Bian, G. (2019). Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms. (Doctoral Dissertation). Sorbonne université. Retrieved from http://www.theses.fr/2019SORUS179
Chicago Manual of Style (16th Edition):
Bian, Guojie. “Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms.” 2019. Doctoral Dissertation, Sorbonne université. Accessed March 07, 2021.
http://www.theses.fr/2019SORUS179.
MLA Handbook (7th Edition):
Bian, Guojie. “Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms.” 2019. Web. 07 Mar 2021.
Vancouver:
Bian G. Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms. [Internet] [Doctoral dissertation]. Sorbonne université; 2019. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2019SORUS179.
Council of Science Editors:
Bian G. Effets électrodynamiques et nucléaires quantiques dans les ions de type lithium et les atomes muoniques : Quantum Electrodynamic and nuclear effects in Li-like ions and muonic atoms. [Doctoral Dissertation]. Sorbonne université; 2019. Available from: http://www.theses.fr/2019SORUS179
University of Waterloo
15.
Orgiazzi, Jean-Luc François-Xavier.
Circuit Quantum Electrodynamics with Flux Qubits.
Degree: 2019, University of Waterloo
URL: http://hdl.handle.net/10012/15133
► This thesis presents circuit quantum electrodynamic (cQED) experiments done with artificial atoms coupled to a high quality factor superconducting microwave resonator. This work discusses the…
(more)
▼ This thesis presents circuit quantum electrodynamic (cQED) experiments done with artificial atoms coupled to a high quality factor superconducting microwave resonator. This work discusses the theoretical framework, design, fabrication, implementation and characterization of a multi-qubit system using superconducting persistent current qubits, often referred as flux qubits.
We developed a new type of cryogenic aid for fast turnaround microwave experiments. The minimum turnaround time to perform microwave experiments in dilution refrigerators is typically a few days, as required by cooling down and warming up the entire refrigerator. The cryogenic microwave payload and wiring needed for each qubit and resonator add a significant heat load to
the system which typically only has a few µW s of cooling power at millikelvin temperatures. We present a new experimental approach we developed in which a suitable sample holder is attached to a cold-insertable probe and brought in contact with transmission lines permanently mounted inside the cryostat. The total turnaround time is reduced to 8 hours if the target temperature is 80 mK. This new measurement method increased our ability to successfully identify good devices with fast design-characterization iterations, while allowing months-long measurements at 30 mK.
Our device architecture uses several qubits, each of which is controlled via on-chip fast flux bias lines. Readout of the qubit’s quantum state is performed by homodyne detection of the resonator field at large driving power. We observe long coherence times at the optimal bias point of the flux qubits and present decoherence measurements around this optimal point, where the
flux qubits couple mostly to magnetic flux noise. Dynamical decoupling techniques employing fast microwave pulses are used to protect the qubit’s coherence and allow calculating the magnetic flux noise power spectral density of the qubit’s environment. Photon-mediated interaction between distant qubits in the resonator allows the implementation of a two-qubit controlled-NOT gate
using the selective darkening technique.
This multi-qubit superconducting design is an interesting platform to study the decoherence properties of flux qubits, the properties of strong interaction of electromagnetic radiation with macroscopic quantum systems. These results demonstrate the potential of cQED as a platform for fundamental investigations of decoherence and quantum dynamics of flux qubits.
Subjects/Keywords: circuit QED; flux qubit; superconductivity; quantum computing; decoherence; CNOT gate
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APA (6th Edition):
Orgiazzi, J. F. (2019). Circuit Quantum Electrodynamics with Flux Qubits. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15133
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Orgiazzi, Jean-Luc François-Xavier. “Circuit Quantum Electrodynamics with Flux Qubits.” 2019. Thesis, University of Waterloo. Accessed March 07, 2021.
http://hdl.handle.net/10012/15133.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Orgiazzi, Jean-Luc François-Xavier. “Circuit Quantum Electrodynamics with Flux Qubits.” 2019. Web. 07 Mar 2021.
Vancouver:
Orgiazzi JF. Circuit Quantum Electrodynamics with Flux Qubits. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10012/15133.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Orgiazzi JF. Circuit Quantum Electrodynamics with Flux Qubits. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/15133
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade Nova
16.
Amaro, Pedro Manuel Duarte Gonçalves.
Study of forbidden transitions in atomic systems.
Degree: 2011, Universidade Nova
URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/6916
► A Thesis submitted for the co-tutelle degree of Doctor in Physics at Universidade Nova de Lisboa and Université Pierre et Marie Curie
One active topic…
(more)
▼ A Thesis submitted for the co-tutelle degree of Doctor in Physics at Universidade Nova de Lisboa and Université Pierre et Marie Curie
One active topic in Atomic Physics is the study of highly charged ions (HCI). These
physical systems have a strong Coulomb field that provides a unique opportunity to investigate and validate relativistic, Quantum ElectroDynamics (QED), and many-body
e ects. Moreover, fundamental test on symmetries and parity violation gives clues to the physics beyond the Standard Model. Thus, nowadays, a primary goal of Atomic Physics is the existence of precise experimental data and accurate theoretical calculations for these systems.
In this thesis I focus on the investigation of forbidden radiative transitions in HCI. The main emphasis of this work is on atomic transitions, in which the selection rules forbids the emission of electric dipole photons. In this special type of radiative transition, the electron decays mainly through the emission of a single magnetic dipole photon, or two electric dipole photons. Both types of decay are investigated either experimentally or
theoretically.
The two-photon decay is only theoretically investigated, using a full relativistic formalism,in HCI with one or two electrons. Several physical e ects in the two photon decay, such as resonances, the Dirac’s negative continuum or angular correlations are considered.
Related with the decay, two-photon excitation is also investigated. According to
these evaluations, I stress the importance of relativistic and nondipolar e ects. Moreover, a new approach based on the B-polynomials basis set is employed on two-photon transitions.
The second part of the work is devoted to the precise measurement of transitions in highly charged Ar with two to four electrons. For that matter, I describe the technical features of a double crystal spectrometer used to perform those measurements in HCI for the first time. This kind of spectrometer is able to perform absolute and precise measurements with an accuracy never achieved in these systems, which enables a comparison with recent
QED calculations. I describe a Monte-Carlo code developed with the purpose of studying several systematic errors, as well as testing the various methods of retrieving
physical quantities from raw data. Finally, I present the first absolute 2 ppm measurements on HCI with this spectrometer, paying special attention on the forbidden magnetic dipole transition in He-like Ar.
Accõess Integradas Luso-Alem˜as (Contract no A-19/09); Fundação de Ciências e Tecnologia (FCT)- contract SFRH/BD/37404/2007 ; Programa Operacional Potencial Humano (POPH/FSE) and
European Union social fund
Advisors/Committee Members: José, Santos, Indelicato, Paul.
Subjects/Keywords: Forbidden transitions; HCI; QED; Multi-photon processes; ECRIS; Xray spectroscopy
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APA (6th Edition):
Amaro, P. M. D. G. (2011). Study of forbidden transitions in atomic systems. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/6916
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Amaro, Pedro Manuel Duarte Gonçalves. “Study of forbidden transitions in atomic systems.” 2011. Thesis, Universidade Nova. Accessed March 07, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/6916.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Amaro, Pedro Manuel Duarte Gonçalves. “Study of forbidden transitions in atomic systems.” 2011. Web. 07 Mar 2021.
Vancouver:
Amaro PMDG. Study of forbidden transitions in atomic systems. [Internet] [Thesis]. Universidade Nova; 2011. [cited 2021 Mar 07].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/6916.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Amaro PMDG. Study of forbidden transitions in atomic systems. [Thesis]. Universidade Nova; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/6916
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
ETH Zürich
17.
Stockklauser, Anna.
Strong Coupling Circuit QED with Semiconductor Quantum Dots.
Degree: 2017, ETH Zürich
URL: http://hdl.handle.net/20.500.11850/259894
► Circuit quantum electrodynamics (QED) is a powerful approach to study excitations of and engineer and control interactions between superconducting qubits using microwave quantum fields. Recently,…
(more)
▼ Circuit quantum electrodynamics (
QED) is a powerful approach to study excitations of and engineer and control interactions between superconducting qubits using microwave quantum fields. Recently, the potential of circuit
QED has also been explored in the context of semiconductor quantum systems motivated by the possibility to study their excitations in new frequency regimes and the progress towards quantum information architectures based on semiconductor nanostructures. Two hybrid circuit
QED architectures are explored in this thesis. They consist of gate-defined semiconductor double quantum dots acting as two-level quantum systems dipole coupled to single photonic modes of microwave cavities.
In the first type of device, the double quantum dot charge qubit couples to a superconducting coplanar waveguide resonator at a rate lower than its decoherence rate. This weakly coupled system already provides an interesting platform to study the physics of the quantum dots at microwave frequencies. This thesis discusses experiments exploring microwave emission from a voltage-biased double quantum dot. We detect radiation emitted in inelastic electron tunneling processes between the dots and the leads and in interdot transitions resonant with the cavity. The dependence of the emission signal on the quantum dot level configuration provides a novel way to probe the hybridization and broadening of the electronic double dot states.
In the second device architecture, the double quantum dot is coupled to a frequency-tunable high impedance resonator consisting of an array of superconducting quantum interference devices. Due to the high characteristic impedance of these resonators, the coupling strength is increased beyond the decay rates of qubit and resonator – the condition defining the strong coupling regime. Strong coupling is demonstrated in measurements of the vacuum Rabi mode splitting showing a coupling strength of 155 MHz, which is the highest coupling strength reported in comparable systems.The qubit linewidth of 40 MHz is independently extracted in spectroscopy measurements. Achieving strong coupling to microwave cavities poses a crucial step towards semiconductor-based quantum information architectures as it enables e.g. time-resolved measurements, quantum non-demolition readout or the coupling of distant qubits or different types of qubits via the resonator.
Advisors/Committee Members: Wallraff, Andreas, Ensslin, Klaus, Ihn, Thomas M., Vandersypen, Lieven M. K..
Subjects/Keywords: Circuit QED, quantum dots; info:eu-repo/classification/ddc/530; Physics
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APA (6th Edition):
Stockklauser, A. (2017). Strong Coupling Circuit QED with Semiconductor Quantum Dots. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/259894
Chicago Manual of Style (16th Edition):
Stockklauser, Anna. “Strong Coupling Circuit QED with Semiconductor Quantum Dots.” 2017. Doctoral Dissertation, ETH Zürich. Accessed March 07, 2021.
http://hdl.handle.net/20.500.11850/259894.
MLA Handbook (7th Edition):
Stockklauser, Anna. “Strong Coupling Circuit QED with Semiconductor Quantum Dots.” 2017. Web. 07 Mar 2021.
Vancouver:
Stockklauser A. Strong Coupling Circuit QED with Semiconductor Quantum Dots. [Internet] [Doctoral dissertation]. ETH Zürich; 2017. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/20.500.11850/259894.
Council of Science Editors:
Stockklauser A. Strong Coupling Circuit QED with Semiconductor Quantum Dots. [Doctoral Dissertation]. ETH Zürich; 2017. Available from: http://hdl.handle.net/20.500.11850/259894
University of Oxford
18.
Barter, Oliver.
Deterministic quantum feedback control in probabilistic atom-photon entanglement.
Degree: PhD, 2016, University of Oxford
URL: http://ora.ox.ac.uk/objects/uuid:9faa5f68-39fa-4bd2-9362-785b3cd0111e
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730144
► The prospect of a universal quantum computer is alluring, yet formidable. Smaller scale quantum information processing, however, has been demonstrated. Quantum networks, interlinking flying and…
(more)
▼ The prospect of a universal quantum computer is alluring, yet formidable. Smaller scale quantum information processing, however, has been demonstrated. Quantum networks, interlinking flying and stationary qubits, and linear optical quantum computing (LOQC) are both good candidates for scaling up such computations. A strongly coupled atom-cavity system is a promising approach for applications in these fields, both as a node in a quantum network, and as a source of photons for LOQC. This thesis demonstrates the versatile capabilities of an atom-cavity system comprising a single 87Rb atom within a macroscopic high-finesse Fabry-Pérot cavity. It operates intermittently for periods of up to 100 μs, with single-photon repetition rates of 1 MHz and an intra-cavity production efficiency of up to 85%. Exploiting the long coherence time of around 500 ns, the photons are subdivided into d time bins, with arbitrary amplitudes and phases, thus encoding arbitrary qudits. High fidelity quantum logic is shown, operating a controlled-NOT gate integrated into a photonic chip with a classical fidelity of 95.9+1.4<sub style='position: relative; left: -1.6em;'>-1.7</sub> %. Additionally, the generation of entanglement is verified and non-classical correlations between events separated by periods exceeding the travel time across the chip by three orders of magnitude are observed. Photonic quantum simulation is performed, using temporally encoded qudits to mimic the correlation statistics of both fermions and anyons, in addition to bosons. Finally measurement-based quantum feedback is demonstrated and used to actively control the routing of temporal qubits.
Subjects/Keywords: 539.7; Atomic & Laser Physics; Cavity QED; Quantum Computing; Quantum Feedback
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APA (6th Edition):
Barter, O. (2016). Deterministic quantum feedback control in probabilistic atom-photon entanglement. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:9faa5f68-39fa-4bd2-9362-785b3cd0111e ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730144
Chicago Manual of Style (16th Edition):
Barter, Oliver. “Deterministic quantum feedback control in probabilistic atom-photon entanglement.” 2016. Doctoral Dissertation, University of Oxford. Accessed March 07, 2021.
http://ora.ox.ac.uk/objects/uuid:9faa5f68-39fa-4bd2-9362-785b3cd0111e ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730144.
MLA Handbook (7th Edition):
Barter, Oliver. “Deterministic quantum feedback control in probabilistic atom-photon entanglement.” 2016. Web. 07 Mar 2021.
Vancouver:
Barter O. Deterministic quantum feedback control in probabilistic atom-photon entanglement. [Internet] [Doctoral dissertation]. University of Oxford; 2016. [cited 2021 Mar 07].
Available from: http://ora.ox.ac.uk/objects/uuid:9faa5f68-39fa-4bd2-9362-785b3cd0111e ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730144.
Council of Science Editors:
Barter O. Deterministic quantum feedback control in probabilistic atom-photon entanglement. [Doctoral Dissertation]. University of Oxford; 2016. Available from: http://ora.ox.ac.uk/objects/uuid:9faa5f68-39fa-4bd2-9362-785b3cd0111e ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730144
Durham University
19.
Kizilersü, Ayşe.
Gauge theory constraints on the fermion-boson vertex.
Degree: PhD, 1995, Durham University
URL: http://etheses.dur.ac.uk/4886/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283162
► In this thesis we investigate the role played by fundamental properties of QED in determining the non-perturbative fermion-boson vertex. These key features are gauge invariance…
(more)
▼ In this thesis we investigate the role played by fundamental properties of QED in determining the non-perturbative fermion-boson vertex. These key features are gauge invariance and multiplicative renormalisability. We use the Schwinger-Dyson equations as the non- perturbative tool to study the general structure of the fermion-boson vertex in QED. These equations, being an infinite set, have to be truncated if they are to be solved. Such a truncation is made possible by choosing a suitable non-perturbative ansatz for the fermion-boson vertex. This choice must satisfy these key properties of gauge invariance and multiplicative renormalisability. In this thesis we develop the constraints, in the case of massless unquenched QED, that have to be fulfilled to ensure that both the fermion and photon propagators are multiplicatively renormalisable-at least as far as leading and subleading logarithms are concerned. To this end, the Schwinger-Dyson equations are solved perturbatively for the fermion and photon wave-function renormalisations. We then deduce the conditions imposed by multiplicative renormalisability for these renormalisation functions. As a last step we compare the two results coming from the solution of the Schwinger-Dyson equations and multiplicative renormalisability in order to derive the necessary constraints on the vertex function. These constitute the main results of this part of the thesis. In the weak coupling limit the solution of the Schwinger-Dyson equations must agree with perturbation theory. Consequently, we can find additional constraints on the 3- point vertex by perturbative calculation. Hence, the one loop vertex in QED is then calculated in arbitrary covariant gauges as an analytic function of its momenta. The vertex is decomposed into a longitudinal part, that is fully responsible for ensuring the Ward and Ward-Takahashi identities are satisfied, and a transverse part. The transverse part is decomposed into 8 independent components each being separately free of kinematic singularities in any covariant gauge in a basis that modifies that proposed by Ball and Chiu. Analytic expressions for all 11 components of the O(a) vertex are given explicitly in terms of elementary functions and one Spence function. These results greatly simplify in particular kinematic regimes. These are the new results of the second part of this thesis.
Subjects/Keywords: 530.1; Quantum field theory; QED
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APA (6th Edition):
Kizilersü, A. (1995). Gauge theory constraints on the fermion-boson vertex. (Doctoral Dissertation). Durham University. Retrieved from http://etheses.dur.ac.uk/4886/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283162
Chicago Manual of Style (16th Edition):
Kizilersü, AyÅŸe. “Gauge theory constraints on the fermion-boson vertex.” 1995. Doctoral Dissertation, Durham University. Accessed March 07, 2021.
http://etheses.dur.ac.uk/4886/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283162.
MLA Handbook (7th Edition):
Kizilersü, AyÅŸe. “Gauge theory constraints on the fermion-boson vertex.” 1995. Web. 07 Mar 2021.
Vancouver:
Kizilersü A. Gauge theory constraints on the fermion-boson vertex. [Internet] [Doctoral dissertation]. Durham University; 1995. [cited 2021 Mar 07].
Available from: http://etheses.dur.ac.uk/4886/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283162.
Council of Science Editors:
Kizilersü A. Gauge theory constraints on the fermion-boson vertex. [Doctoral Dissertation]. Durham University; 1995. Available from: http://etheses.dur.ac.uk/4886/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283162
University of Oxford
20.
Nisbet-Jones, Peter.
Shaping single photons.
Degree: PhD, 2012, University of Oxford
URL: http://ora.ox.ac.uk/objects/uuid:c75d4896-c5a8-42b8-a166-ffcd4166fc09
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581021
► The possibility of creating a scaleable quantum network by interconverting photonic and atomic qubits shows great promise. The fundamental requirement for such a network is…
(more)
▼ The possibility of creating a scaleable quantum network by interconverting photonic and atomic qubits shows great promise. The fundamental requirement for such a network is deterministic control over the emission and absorption of photons from single atoms. This thesis reports on the experi-mental construction of a photon source that can emit single-photons with arbitrary spatio-temporal shape, phase, and frequency. The photon source itself is a strongly-coupled atom cavity system based on a single 87 Rb atom within a macroscopic high-finesse Fabry-Perot cavity. It operates intermittently for periods of up to 100µs, with single-photon repetition rates of 1.0 MHz and an efficiency of almost 80%. Atoms are loaded into the cavity using an atomic fountain, with the upper turning point near the centre of the cavity mode. This ensures long interaction times without any disturbances introduced by trapping potentials. The photons’ indistinguishability was tested, with a two-photon Hong-Ou-Mandel visibility of 87%. This ability to both generate, and control, the photons’ properties, for example producing photons with symmetric or multi-peaked spatio-temporal shapes, allows for the production of photons in an n-time-bin superposition state where each time-bin has an arbitrarily defined amplitude and phase. These photons can be used as photonic qubits, qutrits and qquads, and their properties have been tested using a small linear-optics network.
Subjects/Keywords: 539.7; Atomic and laser physics; cavity QED; quantum computing; quantum simulation
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APA (6th Edition):
Nisbet-Jones, P. (2012). Shaping single photons. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:c75d4896-c5a8-42b8-a166-ffcd4166fc09 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581021
Chicago Manual of Style (16th Edition):
Nisbet-Jones, Peter. “Shaping single photons.” 2012. Doctoral Dissertation, University of Oxford. Accessed March 07, 2021.
http://ora.ox.ac.uk/objects/uuid:c75d4896-c5a8-42b8-a166-ffcd4166fc09 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581021.
MLA Handbook (7th Edition):
Nisbet-Jones, Peter. “Shaping single photons.” 2012. Web. 07 Mar 2021.
Vancouver:
Nisbet-Jones P. Shaping single photons. [Internet] [Doctoral dissertation]. University of Oxford; 2012. [cited 2021 Mar 07].
Available from: http://ora.ox.ac.uk/objects/uuid:c75d4896-c5a8-42b8-a166-ffcd4166fc09 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581021.
Council of Science Editors:
Nisbet-Jones P. Shaping single photons. [Doctoral Dissertation]. University of Oxford; 2012. Available from: http://ora.ox.ac.uk/objects/uuid:c75d4896-c5a8-42b8-a166-ffcd4166fc09 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581021
21.
Linsefors, Linda.
Multi-photon emission in QED with strong background fields.
Degree: Physics, 2012, Umeå University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56265
► In recent and upcoming years new lasers are being constructed withever higher intensity. These lasers open up the possibility of probingthe high intensity regime…
(more)
▼ In recent and upcoming years new lasers are being constructed withever higher intensity. These lasers open up the possibility of probingthe high intensity regime of particle physics, which will lead to etherconrming our current models in this regime or the discovery of beyondstandard model physics. However most previous theoretical results in thisarea are based old assumptions about the intensity and shape of the laserpulse that are no longer valid. In this thesis we calculate the tree-levelprobabilities for multi photon emission from an electron propagating inan arbitrary plane wave electromagnetic eld. We show that the classicallimit of our result agrees with the purely classical description of the sameevent. We calculate the soft emission correction to non-linear Comptonscattering. We conclude that our results are infrared divergent and arguethat this will be solved by including loop contributions to the process. Ourresults provide an important component for the theoretical predictions forthe outcome of scattering experiments in high intensity background eld.This thesis will add to the understanding of high intensity QED.
Subjects/Keywords: QED; laser; electron; photon
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APA (6th Edition):
Linsefors, L. (2012). Multi-photon emission in QED with strong background fields. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56265
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Linsefors, Linda. “Multi-photon emission in QED with strong background fields.” 2012. Thesis, UmeÃ¥ University. Accessed March 07, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56265.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Linsefors, Linda. “Multi-photon emission in QED with strong background fields.” 2012. Web. 07 Mar 2021.
Vancouver:
Linsefors L. Multi-photon emission in QED with strong background fields. [Internet] [Thesis]. Umeå University; 2012. [cited 2021 Mar 07].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56265.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Linsefors L. Multi-photon emission in QED with strong background fields. [Thesis]. Umeå University; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56265
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Adelaide
22.
Perry, Robert James.
Electromagnetic Form Factors of Hadrons in the Space-Like Region.
Degree: 2019, University of Adelaide
URL: http://hdl.handle.net/2440/124505
► The theory of the strong force is unique amongst the known forces of nature in that the strength of its interactions grow with distance. It…
(more)
▼ The theory of the strong force is unique amongst the known forces of nature in that the
strength of its interactions grow with distance. It is postulated that this leads to the empirically
observed colour con nement hypothesis. This hypothesis states that quarks and gluons, the
fundamental degrees of freedom in the strong force form together into complex bound states
called hadrons, rather than appearing as free particles. Thus the study of the strong force
becomes the study of hadrons and their structure. One way we may study the structure of
these composite bound states is through their electromagnetic interactions. In particular,
information may be drawn about the structure of these hadrons from their elastic scattering
data in the form of the hadron's electromagnetic form factors. In this thesis, predictions are made of the nucleon and hyperon electromagnetic form factors by utilizing a non-perturbative quark model dressed by a pion cloud. Constraints from chiral symmetry arguments lead us to propose performing these chiral loop e ects at the hadron level which leads to an improvement in a number of low energy observables related to the electromagnetic form factors. The extraction of the pion form factor from pion electroproduction is also studied in detail. Constraints from gauge invariance are used to argue that the current model used to extract the pion form factor may be too simplistic. We study the model dependence in the context of a simple toy model, and nd that the possible errors associated with this approximation could be as large as ten percent. We then proceed to perform a more in-depth calculation with a more sophisticated model, and show that the qualitative e ects are the same. Together, these
two studies imply that current measurements of the pion form factor are overestimated.
Advisors/Committee Members: Thomas, Anthony W. (advisor), Zanotti, James (advisor), School of Physical Sciences (school).
Subjects/Keywords: Hadronic Physics; Electromagnetic Form Factors; QeD; Gauge Invariance
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APA (6th Edition):
Perry, R. J. (2019). Electromagnetic Form Factors of Hadrons in the Space-Like Region. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/124505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Perry, Robert James. “Electromagnetic Form Factors of Hadrons in the Space-Like Region.” 2019. Thesis, University of Adelaide. Accessed March 07, 2021.
http://hdl.handle.net/2440/124505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Perry, Robert James. “Electromagnetic Form Factors of Hadrons in the Space-Like Region.” 2019. Web. 07 Mar 2021.
Vancouver:
Perry RJ. Electromagnetic Form Factors of Hadrons in the Space-Like Region. [Internet] [Thesis]. University of Adelaide; 2019. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/2440/124505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Perry RJ. Electromagnetic Form Factors of Hadrons in the Space-Like Region. [Thesis]. University of Adelaide; 2019. Available from: http://hdl.handle.net/2440/124505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Bordyuh, Mykola.
Many-Body Effects in Coupled Light-Matter Systems
.
Degree: PhD, 2015, Princeton University
URL: http://arks.princeton.edu/ark:/88435/dsp016108vd657
► Interaction between light and matter is one of the most basic processes in nature and represents a cornerstone in our understanding of a broad range…
(more)
▼ Interaction between light and matter is one of the most basic processes in nature and represents a cornerstone in our understanding of a broad range of physical phenom- ena. The increasing level of control over light-matter interactions with atomic and solid-state systems has brought forth a new class of quantum many-body systems realized on photon lattices where light and matter play equally important roles in emergent phenomena. Systems of strongly interacting atoms and photons, that can be realized by wiring up individual cavity
QED systems into lattices, are perceived as a new platform for engineering synthetic hybrid light-matter systems. While sharing important properties with other systems of interacting quantum particles, here we argue that the nature of light-matter interaction gives rise to unique features with no analogs in condensed matter or atomic physics setups. The central topic of the thesis is a lattice of cavity
QED systems described by the Rabi-Hubbard model. We de- scribe the most prominent features of the model associated with quantum criticality. We consider a realistic case of the system open to the environment and investigate thermal radiation from a lattice of cavity
QED systems. Next, we demonstrate that the output radiation displays unique features associated with collective excitations of light and matter. Further, we consider a non-equilibrium lattice of cavity
QED systems and demonstrate exotic attractors in the phase diagram, associated with the action of the environment, not present in the equilibrium analogs. We conclude the discussions with a theory of measurement applied to the non-equilibrium Dicke model and compare our findings to a recent experiment.
Advisors/Committee Members: Bordyuh, Mykola (advisor).
Subjects/Keywords: cavity QED lattice
…1.3
Schematic diagram of a lattice of cavity QED systems, representing
coupled resonators… …basic cavity QED setup. Photonic
mode of the cavity interacts with a two-level system at a… …xii
19
2.5
Schematic representation of the circuit QED, where a superconducting
qubit… …wavelength. Right figure demonstrates an actual
circuit QED device that achieves the strong… …ωc = 0.1. . . . . . .
3.1
54
Schematic diagram of a 2D lattice of cavity QED systems…
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APA (6th Edition):
Bordyuh, M. (2015). Many-Body Effects in Coupled Light-Matter Systems
. (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp016108vd657
Chicago Manual of Style (16th Edition):
Bordyuh, Mykola. “Many-Body Effects in Coupled Light-Matter Systems
.” 2015. Doctoral Dissertation, Princeton University. Accessed March 07, 2021.
http://arks.princeton.edu/ark:/88435/dsp016108vd657.
MLA Handbook (7th Edition):
Bordyuh, Mykola. “Many-Body Effects in Coupled Light-Matter Systems
.” 2015. Web. 07 Mar 2021.
Vancouver:
Bordyuh M. Many-Body Effects in Coupled Light-Matter Systems
. [Internet] [Doctoral dissertation]. Princeton University; 2015. [cited 2021 Mar 07].
Available from: http://arks.princeton.edu/ark:/88435/dsp016108vd657.
Council of Science Editors:
Bordyuh M. Many-Body Effects in Coupled Light-Matter Systems
. [Doctoral Dissertation]. Princeton University; 2015. Available from: http://arks.princeton.edu/ark:/88435/dsp016108vd657
Princeton University
24.
Raftery, James John.
Nonequilibrium Quantum Simulation in Circuit QED
.
Degree: PhD, 2017, Princeton University
URL: http://arks.princeton.edu/ark:/88435/dsp019593tx73k
► Superconducting circuits have become a leading architecture for quantum computing and quantum simulation. In particular, the circuit QED framework leverages high coherence qubits and microwave…
(more)
▼ Superconducting circuits have become a leading architecture for quantum computing and quantum simulation. In particular, the circuit
QED framework leverages high coherence qubits and microwave resonators to construct systems realizing quantum optics models with exquisite precision. For example, the Jaynes-Cummings model has been the focus of significant theoretical interest as a means of generating photon-photon interactions. Lattices of such strongly correlated photons are an exciting new test bed for exploring non-equilibrium condensed matter physics such as dissipative phase transitions of light.
This thesis covers a series of experiments which establish circuit
QED as a powerful tool for exploring condensed matter physics with photons. The first experiment explores the use of ultra high speed arbitrary waveform generators for the direct digital synthesis of complex microwave waveforms. This new technique dramatically simplifies the classical control chain for quantum experiments and enables high bandwidth driving schemes expected to be essential for generating interesting steady-states and dynamical behavior.
The last two experiments explore the rich physics of interacting photons, with an emphasis on small systems where a high degree of control is possible. The first experiment realizes a two-site system called the Jaynes-Cummings dimer, which undergoes a self-trapping transition where the strong photon-photon interactions block photon hopping between sites. The observation of this dynamical phase transition and the related dissipation-induced transition are key results of this thesis. The final experiment augments the Jaynes-Cummings dimer by redesigning the circuit to include in-situ control over photon hopping between sites using a tunable coupler. This enables the study of the dimer's localization transition in the steady-state regime.
Advisors/Committee Members: Houck, Andrew A (advisor).
Subjects/Keywords: Circuit QED;
Interacting Photons;
Nonequilibrium;
Phase Transition;
Superconducting Qubit
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APA (6th Edition):
Raftery, J. J. (2017). Nonequilibrium Quantum Simulation in Circuit QED
. (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp019593tx73k
Chicago Manual of Style (16th Edition):
Raftery, James John. “Nonequilibrium Quantum Simulation in Circuit QED
.” 2017. Doctoral Dissertation, Princeton University. Accessed March 07, 2021.
http://arks.princeton.edu/ark:/88435/dsp019593tx73k.
MLA Handbook (7th Edition):
Raftery, James John. “Nonequilibrium Quantum Simulation in Circuit QED
.” 2017. Web. 07 Mar 2021.
Vancouver:
Raftery JJ. Nonequilibrium Quantum Simulation in Circuit QED
. [Internet] [Doctoral dissertation]. Princeton University; 2017. [cited 2021 Mar 07].
Available from: http://arks.princeton.edu/ark:/88435/dsp019593tx73k.
Council of Science Editors:
Raftery JJ. Nonequilibrium Quantum Simulation in Circuit QED
. [Doctoral Dissertation]. Princeton University; 2017. Available from: http://arks.princeton.edu/ark:/88435/dsp019593tx73k
Princeton University
25.
Vrajitoarea, Marius Andrei.
Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
.
Degree: PhD, 2020, Princeton University
URL: http://arks.princeton.edu/ark:/88435/dsp019880vv04k
► In recent years, superconducting circuits have become a promising architecture for quantum computing and quantum simulation. This advancing technology offers excellent scalability, long coherence times,…
(more)
▼ In recent years, superconducting circuits have become a promising architecture for quantum computing and quantum simulation. This advancing technology offers excellent scalability, long coherence times, and large photon nonlinearities, making it a versatile platform for studying non-equilibrium condensed matter physics with light. This thesis covers a series of experiments and theoretical developments aimed at probing strongly correlated states of interacting photons. Building upon previous efforts on nonlinear superconducting lattices, this work focuses on establishing new platforms for generating interactions between microwave photons in multi-mode circuits.
The first experiment presents a new paradigm in exploiting the nonlinearity of a Josephson junction to tailor the Hilbert space of harmonic oscillators using a dynamical three-wave mixing process. This allows a single microwave resonator to be addressed as a two-level system, offering a promising pathway to long-lived qubits. A theoretical proposal is outlined for building a field-programmable quantum simulator, harnessing this dynamical nonlinearity for stimulating strong photon-photon interactions. The system consists of a lattice of harmonic modes in synthetic dimensions, where particle hopping and on-site interactions can be independently controlled via frequency-selective flux modulation. Numerical studies show that for strong interactions the driven-dissipative steady-state develops a crystalline phase for photons.
The second experiment explores the physics of quantum impurities, where a single well-controlled qubit is coupled to the many modes of a photonic crystal waveguide. The light-matter coupling strength is pushed into the ultrastrong coupling regime, where the qubit is simultaneously hybridized with many modes and the total number of excitations is not conserved. Probing transport through the waveguide reveals that the propagation of a single photon becomes a many-body problem as multi-photon bound states participate in the scattering dynamics. Furthermore, the effective photon interactions induced by just this single impurity leads to interesting inelastic emission of photons. Probing correlations in the field emission reveals signatures of multi-mode entanglement.
This work presents opportunities for exploring large-scale lattices with strongly interacting photons. These platforms are compatible with well-established techniques for generating artificial magnetic fields and stabilizing many-body states through reservoir engineering, complementing growing efforts in the quest for building synthetic quantum materials with light.
Advisors/Committee Members: Houck, Andrew A (advisor).
Subjects/Keywords: circuit QED;
quantum optics;
quantum simulation;
superconducting qubits
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APA (6th Edition):
Vrajitoarea, M. A. (2020). Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
. (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp019880vv04k
Chicago Manual of Style (16th Edition):
Vrajitoarea, Marius Andrei. “Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
.” 2020. Doctoral Dissertation, Princeton University. Accessed March 07, 2021.
http://arks.princeton.edu/ark:/88435/dsp019880vv04k.
MLA Handbook (7th Edition):
Vrajitoarea, Marius Andrei. “Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
.” 2020. Web. 07 Mar 2021.
Vancouver:
Vrajitoarea MA. Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
. [Internet] [Doctoral dissertation]. Princeton University; 2020. [cited 2021 Mar 07].
Available from: http://arks.princeton.edu/ark:/88435/dsp019880vv04k.
Council of Science Editors:
Vrajitoarea MA. Strongly correlated photonic materials: parametric interactions and ultrastrong coupling in circuit QED
. [Doctoral Dissertation]. Princeton University; 2020. Available from: http://arks.princeton.edu/ark:/88435/dsp019880vv04k
University of Waterloo
26.
Groszkowski, Peter.
Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems.
Degree: 2015, University of Waterloo
URL: http://hdl.handle.net/10012/9546
► In recent years, superconducting circuits have come to the forefront of certain areas of physics. They have shown to be particularly useful in research related…
(more)
▼ In recent years, superconducting circuits have come to the forefront of certain areas of physics. They have shown to be particularly useful in research related to quantum computing and information, as well as fundamental physics. This is largely because they provide a very flexible way to implement complicated quantum systems that can be relatively easily manipulated and measured. In this thesis we look at three different applications where superconducting circuits play a central role, and explore their classical and quantum dynamics and behavior.
The first part consists of studying the Casimir [Proc. K. Ned. Akad. Wet (1948)] and Casimir-Polder like [Physical Review 73, 4 (1948)]effects. These effects have been discovered in 1948 and show that under certain conditions, vacuum field fluctuations can mediate forces between neutral objects. In our work, we analyze analogous behavior in a superconducting system which consists of a stripline cavity with a DC-SQUID on one of its boundaries, as well as, in a Casimir-Polder case, a charge qubit coupled to the field of the cavity. Instead of a force, in the system considered here, we show that the Casimir and Casimir-Polder like effects are mediated through a circulating current around the loop of the boundary DC-SQUID. Using detailed analysis, we examine how the values of these currents change as we vary different physical circuit parameters. We show that for the set of physical parameters that can be easily obtained experimentally, the Casimir and Casimir-Polder currents can be of the order of 10^(-8) A and 10^(-13) A respectively.
In the second part, we theoretically model an experiment which was performed by Britton Plourde's group at Syracuse University, and which studied the transient dynamics of a nonlinear superconducting oscillator, based on a capacitively shunted DC-SQUID. Such DC-SQUID oscillators are used in many areas of physics and engineering, for example, as building blocks of amplifiers or qubits, qubit couplers, or as sensitive magnetic field detectors. In many of these situations, their steady state behavior is often considered, while in the experiment performed at Syracuse, of specific interest, was the response of a DC-SQUID oscillator to a short radiation that only briefly excited the system. In this thesis, we simulate this response at the experimental temperature, by numerically solving a set of classical stochastic differential equations that mimic the behavior of the circuit. This is done for different settings of the flux that is threaded through the DC-SQUID as well as different input pulse amplitudes. Furthermore, we briefly outline just how these kinds of brief excitations could be useful when applied in flux measurement protocols. We find that our simulations show good agreement with the experimentally obtained data.
The final part considered in this thesis, looks at the dynamics of a qubit coupled to a measuring probe, which is modeled as a harmonic oscillator. An example superconducting circuit, that could be used to implement…
Subjects/Keywords: quantum computing; supercondcuting circuits; circuit QED; Casimir Effect
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Manager
APA (6th Edition):
Groszkowski, P. (2015). Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/9546
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Groszkowski, Peter. “Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems.” 2015. Thesis, University of Waterloo. Accessed March 07, 2021.
http://hdl.handle.net/10012/9546.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Groszkowski, Peter. “Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems.” 2015. Web. 07 Mar 2021.
Vancouver:
Groszkowski P. Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems. [Internet] [Thesis]. University of Waterloo; 2015. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10012/9546.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Groszkowski P. Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems. [Thesis]. University of Waterloo; 2015. Available from: http://hdl.handle.net/10012/9546
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
27.
Qi, Xiaodong.
The Effects of Multi-exciton Interactions on Optical Cavity Emission
.
Degree: Physics, Engineering Physics and Astronomy, 2012, Queens University
URL: http://hdl.handle.net/1974/7337
► This thesis presents a theoretical study of the collective effects of a large number of photon emitters coupled to optical cavities. The ensemble effects are…
(more)
▼ This thesis presents a theoretical study of the collective effects of a large number
of photon emitters coupled to optical cavities. The ensemble effects are accounted
for by considering both the light emitting and scattering by the photon emitters. It
suggests that, to correctly estimate the emitters ensemble coupled cavity mode, it
is necessary to consider the existence of the excited excitons ensemble and optical
pumps. This thesis shows that optical pumps can excite more excitons and scattering
channels as pumping power increases. The change in exciton population can lead to
comprehensive spectral behaviors by changing the cavity spectral shapes, bandwidth
and resonance positions, through the inhomogeneous broadening and frequencies repulsion
effects of collective emissions. The existence of the exciton ensemble can also
enhance optical coupling effects between target excitons and the cavity mode. The
target exciton, which has a relatively large coupling strength and is close to the cavity
peak, can affect the properties of the background dipoles and their coupling to
the cavity. All these collective effects are sensitive to the number, the resonances
distribution, and the optical properties of the background excitons in the frequency
domain and the property of the target exciton, if any. This study provides a perspective on the control of the optical properties of cavities and individual excitons through collective excitation.
Subjects/Keywords: Collective Emission
;
Optical Property
;
Quantum Dot
;
Optical Cavity
;
Cavity-QED
;
Exciton
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Manager
APA (6th Edition):
Qi, X. (2012). The Effects of Multi-exciton Interactions on Optical Cavity Emission
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/7337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Qi, Xiaodong. “The Effects of Multi-exciton Interactions on Optical Cavity Emission
.” 2012. Thesis, Queens University. Accessed March 07, 2021.
http://hdl.handle.net/1974/7337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Qi, Xiaodong. “The Effects of Multi-exciton Interactions on Optical Cavity Emission
.” 2012. Web. 07 Mar 2021.
Vancouver:
Qi X. The Effects of Multi-exciton Interactions on Optical Cavity Emission
. [Internet] [Thesis]. Queens University; 2012. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1974/7337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Qi X. The Effects of Multi-exciton Interactions on Optical Cavity Emission
. [Thesis]. Queens University; 2012. Available from: http://hdl.handle.net/1974/7337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Maryland
28.
Adhikari, Prabin.
Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED.
Degree: Physics, 2014, University of Maryland
URL: http://hdl.handle.net/1903/16171
► Superconducting quantum circuits are a promising approach for realizations of large scale quantum information processing and quantum simulations. The Josephson junction, which forms the basis…
(more)
▼ Superconducting quantum circuits are a promising approach for realizations of large scale quantum information processing and quantum simulations. The Josephson junction, which forms the basis of superconducting circuits, is the only known nonlinear non-dissipative circuit element, and its inherent nonlinearities have found many different applications. In this thesis I discuss specific implementations of these circuits. I show that strong two-photon nonlinearities can be induced by coupling photons in the microwave domain to Josephson nonlinearities. I then propose a method to simulate a parent Hamiltonian that can potentially be used to observe fractional quantum Hall states of light. I will also explore how superconducting circuits can be used to modify system-bath couplings to emulate a chemical potential for photons. Finally, I consider the limitations of devising a scheme to couple superconducting circuits to trapped ions, and consider the challenges for such hybrid approaches.
Advisors/Committee Members: Taylor, Jacob M. (advisor).
Subjects/Keywords: Physics; Circuit-QED; Hybrid Systems; Quantum Simulation; Superconducting Circuits
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CSE |
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APA (6th Edition):
Adhikari, P. (2014). Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/16171
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Adhikari, Prabin. “Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED.” 2014. Thesis, University of Maryland. Accessed March 07, 2021.
http://hdl.handle.net/1903/16171.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Adhikari, Prabin. “Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED.” 2014. Web. 07 Mar 2021.
Vancouver:
Adhikari P. Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED. [Internet] [Thesis]. University of Maryland; 2014. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1903/16171.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Adhikari P. Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED. [Thesis]. University of Maryland; 2014. Available from: http://hdl.handle.net/1903/16171
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
29.
Chidambaram, Vivek.
Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions.
Degree: PhD, 2019, University of Cambridge
URL: https://doi.org/10.17863/CAM.53209
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810054
► The physics of superconductor-semiconductor hybrid junctions is governed by a combination of the macroscopic quantum coherence of superconducting systems and the mesoscopic physics inherent to…
(more)
▼ The physics of superconductor-semiconductor hybrid junctions is governed by a combination of the macroscopic quantum coherence of superconducting systems and the mesoscopic physics inherent to semiconducting devices and Andreev bound states are the microscopic states which mediate transport through these junctions. In this thesis a series of experiments aimed at understanding Andreev bound states in Josephson junction devices are presented. RF reflectometry measurements of a superconducting tunnel junction are made sensitive near the high tunnel resistance by an impedance transforming tank circuit which can be adapted for different device resistances. The reflectometry measurement corresponds well with DC transport data meaning this technique can measure Josephson junction dynamics at high frequency. Progress is made towards more transparent superconducting contacts to CVD graphene for graphene Josephson junctions however switching to an epitaxial Al / InAs 2DEG material bypasses the contact transparency issue. Signatures of transport mediated by Andreev bound states in the few mode regime are observed in quantum point contact devices made from this material allowing the possibility of controlling and measuring single Andreev bound states. Josephson junctions coupled to superconducting resonators are measured using microwave frequency detection and DC transport. Andreev bound states in the few mode regime are observed via their effect on the resonator frequency suggesting that Andreev bound states in this material can be coupled to a resonator allowing measurement and control.
Subjects/Keywords: Superconductor-Semiconductor Junctions; Andreev Bound States; Transport; Circuit QED
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Chidambaram, V. (2019). Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.53209 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810054
Chicago Manual of Style (16th Edition):
Chidambaram, Vivek. “Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions.” 2019. Doctoral Dissertation, University of Cambridge. Accessed March 07, 2021.
https://doi.org/10.17863/CAM.53209 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810054.
MLA Handbook (7th Edition):
Chidambaram, Vivek. “Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions.” 2019. Web. 07 Mar 2021.
Vancouver:
Chidambaram V. Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Mar 07].
Available from: https://doi.org/10.17863/CAM.53209 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810054.
Council of Science Editors:
Chidambaram V. Microwave spectroscopy and transport measurements of Andreev bound states in superconductor-semiconductor Josephson junctions. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.53209 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810054
Miami University
30.
Jones, Dyan Lynne.
Quantum Fluctuations of a Cavity QED System with Periodic
Potential.
Degree: MS, Physics, 2005, Miami University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami1121696082
► We examine a cavity QED system comprised of a single atom, a driven cavity, and an optical lattice. Cavity decay, spontaneous emission, detunings, and Franck-Condon…
(more)
▼ We examine a cavity
QED system comprised of a single
atom, a driven cavity, and an optical lattice. Cavity decay,
spontaneous emission, detunings, and Franck-Condon factors are all
accounted for. We expand on previous work by releasing the harmonic
approximation often used for the lattice and replacing it with
Mathieu functions. The intensity-intensity and intensity-field
correlation functions are examined in the weak-field limit in order
to identify and explain non-classical properties
therein.
Advisors/Committee Members: Rice, Perry (Advisor).
Subjects/Keywords: Cavity QED; Lattice; Mathieu; Entanglement
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jones, D. L. (2005). Quantum Fluctuations of a Cavity QED System with Periodic
Potential. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1121696082
Chicago Manual of Style (16th Edition):
Jones, Dyan Lynne. “Quantum Fluctuations of a Cavity QED System with Periodic
Potential.” 2005. Masters Thesis, Miami University. Accessed March 07, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1121696082.
MLA Handbook (7th Edition):
Jones, Dyan Lynne. “Quantum Fluctuations of a Cavity QED System with Periodic
Potential.” 2005. Web. 07 Mar 2021.
Vancouver:
Jones DL. Quantum Fluctuations of a Cavity QED System with Periodic
Potential. [Internet] [Masters thesis]. Miami University; 2005. [cited 2021 Mar 07].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1121696082.
Council of Science Editors:
Jones DL. Quantum Fluctuations of a Cavity QED System with Periodic
Potential. [Masters Thesis]. Miami University; 2005. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1121696082
◁ [1] [2] [3] [4] [5] ▶
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Open Access Theses and Dissertations
