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University of Oklahoma
1.
Abalo, Elom.
Casimir energies of cavities: The geometry question.
Degree: PhD, 2012, University of Oklahoma
URL: http://hdl.handle.net/11244/319236 
► The analysis of these self-energies yields intriguing results. By plotting the scaled energies against the appropriately chosen isoperimetric or isoareal quotients, we observe interesting patterns,…
(more)
▼ The analysis of these self-energies yields intriguing results. By plotting the scaled energies against the appropriately chosen isoperimetric or isoareal quotients, we observe interesting patterns, which hint towards a systematic functional dependence. In addition to the calculation of new
Casimir energies, this constitutes a significant contribution to the theoretical understanding of self-energies and has interesting implications.
Advisors/Committee Members: Milton, Kimball (advisor).
Subjects/Keywords: Casimir effect
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APA (6th Edition):
Abalo, E. (2012). Casimir energies of cavities: The geometry question. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319236
Chicago Manual of Style (16th Edition):
Abalo, Elom. “Casimir energies of cavities: The geometry question.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed March 07, 2021.
http://hdl.handle.net/11244/319236.
MLA Handbook (7th Edition):
Abalo, Elom. “Casimir energies of cavities: The geometry question.” 2012. Web. 07 Mar 2021.
Vancouver:
Abalo E. Casimir energies of cavities: The geometry question. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11244/319236.
Council of Science Editors:
Abalo E. Casimir energies of cavities: The geometry question. [Doctoral Dissertation]. University of Oklahoma; 2012. Available from: http://hdl.handle.net/11244/319236
McMaster University
2.
Hasan, Faiyaz.
Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity.
Degree: PhD, 2016, McMaster University
URL: http://hdl.handle.net/11375/19135
► We study the time evolution of light fields inside a double cavity which is comprised of two perfect end mirrors and a parametrically driven, partially…
(more)
▼ We study the time evolution of light fields inside a double cavity which is comprised of two perfect end mirrors and a parametrically driven, partially transmissive central mirror in both a classical and a quantum mechanical framework. It is common practise in the field of optomechanics to take a Hamiltonian approach ignoring non-linear coupling terms between the light field and the moving mechanical element. By contrast, we start from the Maxwell wave equation which is second order in time and find that a first order in time Schrödinger-type wave equation (equivalent to neglecting the non-linear coupling) is a valid approximation for low enough mirror reflectivity and speed and for large light frequencies. We also study adiabatic dynamics for the Maxwell wave equation and find it differs from the more familiar adiabaticity in the Schrödinger equation.
Next, we numerically simulate the dynamical Casimir effect (DCE) in the double cavity with a sinusoidally driven central mirror following earlier numerical work on the perfect single cavity . Because our central mirror is partially transmissive it is physically more realistic and circumvents fundamental problems associated with having perfectly reflecting moving mirrors . The corresponding photon creation rates are drastically lower when compared to the perfectly reflective mirror case. Furthermore, if we make one of the cavities much longer than the other we can simulate the DCE for a single open cavity coupled to an environment without having to make the Markov approximation. The resultant asymmetric double cavity (ADC) model is valid for times short enough that only a negligible number of the photons that has leaked out of the open cavity has sloshed back in again. As for the symmetric case, one advantage of the ADC is that driven mirror is partially transmissive rather than perfectly reflecting.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: O'Dell, Duncan H J, Physics and Astronomy.
Subjects/Keywords: Dynamical Casimir Effect; Double Cavity
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APA (6th Edition):
Hasan, F. (2016). Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/19135
Chicago Manual of Style (16th Edition):
Hasan, Faiyaz. “Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity.” 2016. Doctoral Dissertation, McMaster University. Accessed March 07, 2021.
http://hdl.handle.net/11375/19135.
MLA Handbook (7th Edition):
Hasan, Faiyaz. “Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity.” 2016. Web. 07 Mar 2021.
Vancouver:
Hasan F. Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity. [Internet] [Doctoral dissertation]. McMaster University; 2016. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11375/19135.
Council of Science Editors:
Hasan F. Numerical Study of The Dynamical Casimir Effect and its Classical Analogue in a Double Cavity. [Doctoral Dissertation]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/19135
University of North Texas
3.
Kuhns, Nehemiah.
Uniserial Representations of Vec(R) with a Single Casimir Eigenvalue.
Degree: 2018, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc1157652/
► In 1980 Feigin and Fuchs classified the length 2 bounded representations of Vec(R), the Lie algebra of polynomial vector fields on the line, as a…
(more)
▼ In 1980 Feigin and Fuchs classified the length 2 bounded representations of Vec(R), the Lie algebra of polynomial vector fields on the line, as a result of their work on the cohomology of Vec(R). This dissertation is concerned mainly with the uniserial (completely indecomposable) representations of Vec(R) with a single
Casimir eigenvalue and weights bounded below. Such representations are composed of irreducible representations with semisimple Euler operator action, bounded weight space dimensions, and weights bounded below. These are known to be the tensor density modules with lowest weight λ, for any non-zero complex number λ, and the trivial module C, with Vec(R) actions π_λ and π_C, respectively. Our proofs are cohomology arguments involving the first cohomology groups of Vec(R) with values in the space of homomorphisms between two irreducible representations. These results classify the finite length uniserial extensions, with a single
Casimir
eigenvalue, of admissible irreducible Vec(R) representations with weights bounded below. In almost every case there is at most one uniserial representation with a given composition series. However, in the case of an odd length extension with composition series {π_1,π_C,π_1,…,π_C,π_1}, there is a one-parameter family of extensions. We also give preliminary results on uniserial representations of the Virasoro Lie algebra.
Advisors/Committee Members: Conley, Charles H., Shepler, Anne V., Brozovic, Douglas P..
Subjects/Keywords: Uniserial; Casimir; Nilpotent; Virasoro; Mathematics
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University of Oklahoma
4.
Wagner, Jeffrey Allen.
Topics on the Scalar Casimir Effect.
Degree: PhD, 2010, University of Oklahoma
URL: http://hdl.handle.net/11244/319142
proximity force approximation.
Advisors/Committee Members: Milton, Kimball A (advisor).Subjects/Keywords: Casimir effect
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APA (6th Edition):
Wagner, J. A. (2010). Topics on the Scalar Casimir Effect. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319142
Chicago Manual of Style (16th Edition):
Wagner, Jeffrey Allen. “Topics on the Scalar Casimir Effect.” 2010. Doctoral Dissertation, University of Oklahoma. Accessed March 07, 2021.
http://hdl.handle.net/11244/319142.
MLA Handbook (7th Edition):
Wagner, Jeffrey Allen. “Topics on the Scalar Casimir Effect.” 2010. Web. 07 Mar 2021.
Vancouver:
Wagner JA. Topics on the Scalar Casimir Effect. [Internet] [Doctoral dissertation]. University of Oklahoma; 2010. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11244/319142.
Council of Science Editors:
Wagner JA. Topics on the Scalar Casimir Effect. [Doctoral Dissertation]. University of Oklahoma; 2010. Available from: http://hdl.handle.net/11244/319142
University of Oklahoma
5.
Parashar, Prachi.
GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES.
Degree: PhD, 2011, University of Oklahoma
URL: http://hdl.handle.net/11244/320304
a single integral) for the lateral force between corrugated (dilute) dielectric slabs.
Advisors/Committee Members: MILTON, KIMBALL A (advisor).Subjects/Keywords: Casimir effect
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APA ·
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CSE |
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APA (6th Edition):
Parashar, P. (2011). GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/320304
Chicago Manual of Style (16th Edition):
Parashar, Prachi. “GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES.” 2011. Doctoral Dissertation, University of Oklahoma. Accessed March 07, 2021.
http://hdl.handle.net/11244/320304.
MLA Handbook (7th Edition):
Parashar, Prachi. “GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES.” 2011. Web. 07 Mar 2021.
Vancouver:
Parashar P. GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES. [Internet] [Doctoral dissertation]. University of Oklahoma; 2011. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11244/320304.
Council of Science Editors:
Parashar P. GEOMETRICAL INVESTIGATIONS OF THE CASIMIR EFFECT: THICKNESS AND CORRUGATION DEPENDENCIES. [Doctoral Dissertation]. University of Oklahoma; 2011. Available from: http://hdl.handle.net/11244/320304
6.
Noto, Antonio.
Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques.
Degree: Docteur es, Physique, 2016, Montpellier; Università degli studi (Palerme, Italie)
URL: http://www.theses.fr/2016MONTT279
► Dans cette thèse, après une introduction où nous présentons brièvement la physique des forces de Casimir, nous montrons nos résultats obtenus pendant le doctorat. D'abord,…
(more)
▼ Dans cette thèse, après une introduction où nous présentons brièvement la physique des forces de
Casimir, nous montrons nos résultats obtenus pendant le doctorat. D'abord, nous montrons notre travail sur les interactions de van der Waals /
Casimir-Polder lorsque le système est dans une configuration hors équilibre à cause du mouvement uniformément accéléré des atomes. Nous étudions le système de deux atomes uniformément accélérés dans le vide quantique quand ils sont dans leur état fondamental ou dans un état corrélé (un atome excité et un atome dans son état fondamental). Nous analysons ce système avec un modèle heuristique semi-classique et une méthode plus rigoureuse qui nous avons étendu à partir d'une procédure générale développée dans la littérature. Nous trouvons un changement de la dépendance de l'interaction de la distance en raison de l'accélération. Nous montrons que les forces de
Casimir-Polder entre deux atomes uniformément accélérés en mouvement relativiste, qui interagissent avec le champ scalaire, présentent une transition à partir d'un comportement thermique à courtes distances, comme prédit par l'effet Unruh, à un comportement non thermique à longues distances, associé à la rupture de la description inertielle et locale du système. En plus, lorsque le cas d'atomes qui interagissent avec le champ électromagnétique quantique est considéré, on constate que de nouvelles caractéristiques apparaissent dans l'interaction.Ensuite, nous présentons notre travail sur un nouveau couplage opto-mécanique d'un miroir oscillant de façon efficace avec un gaz d'atomes de Rydberg, médié par la force atome-miroir dynamique de
Casimir-Polder. Nous constatons que ce couplage peut produire une excitation de résonance atomique de champ proche, qui n'est pas liée à l'excitation des atomes par les quelques photons réels attendus de l'effet
Casimir dynamique. Dans des conditions expérimentales accessibles, cette probabilité d'excitation est importante (environ 20 %) et rend possible l'observation de ce nouvel effet
Casimir-Polder dynamique. Donc nous proposons une configuration expérimentale réaliste pour réaliser ce système fait d'un gaz d'atomes froids piégés mis en face d'un substrat semi-conducteur, dont les propriétés diélectriques sont modulées dans le temps.Enfin, nous nous concentrons sur nos résultats obtenus pour le calcul de la pression
Casimir-Lifshitz entre deux réseaux lamellaires diélectriques différents. Ce système est supposé dans une configuration hors équilibre thermique. En fait, les deux réseaux présentent deux températures différentes et ils sont immergés dans un bain thermique ayant une troisième température. Le calcul de la pression est basé sur une méthode qui exploite les opérateurs de diffusion des réseaux, déduits en utilisant la méthode modale de Fourier. Nous présentons nos résultats numériques caractérisant en détail le comportement de la pression, en faisant varier les trois températures et en modifiant les paramètres géométriques des réseaux. Cette variation des paramètres du système permet de…
Advisors/Committee Members: Antezza, Mauro (thesis director), Passante, Roberto (thesis director), Guizal, Brahim (thesis director).
Subjects/Keywords: Forces de Casimir-Lifshitz; Hors d'équilibre; Effet Casimir; Force de Casimir-Polder; Effet Casimir dynamique; Atomes accélérés; Casimir-Lifshitz forces; Out of equilibrium; Casimir effect; Casimir-Polder forces; Dynamical Casimir effect; Accelerated atoms
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Noto, A. (2016). Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques. (Doctoral Dissertation). Montpellier; Università degli studi (Palerme, Italie). Retrieved from http://www.theses.fr/2016MONTT279
Chicago Manual of Style (16th Edition):
Noto, Antonio. “Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques.” 2016. Doctoral Dissertation, Montpellier; Università degli studi (Palerme, Italie). Accessed March 07, 2021.
http://www.theses.fr/2016MONTT279.
MLA Handbook (7th Edition):
Noto, Antonio. “Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques.” 2016. Web. 07 Mar 2021.
Vancouver:
Noto A. Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques. [Internet] [Doctoral dissertation]. Montpellier; Università degli studi (Palerme, Italie); 2016. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2016MONTT279.
Council of Science Editors:
Noto A. Non-equilibrium Casimir interactions : from dynamical to thermal effects : Les interactiones de Casimir hors d'équilibre : effets dynamiques et thermiques. [Doctoral Dissertation]. Montpellier; Università degli studi (Palerme, Italie); 2016. Available from: http://www.theses.fr/2016MONTT279
Ruhr Universität Bochum
7.
Kalus, Matthias.
Complex analytic aspects of Lie supergroups.
Degree: 2011, Ruhr Universität Bochum
URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31373
► Zwei Probleme physikalischen Ursprungs im Bereich der Supersymmetrien sind Gegenstand der Arbeit. Zuerst wird ausgehend von Harish-Chandra-Superpaaren ein darstellungstheoretischer Zugang zur Kategorie der Lie- Supergruppen…
(more)
▼ Zwei Probleme physikalischen Ursprungs im Bereich
der Supersymmetrien sind Gegenstand der Arbeit. Zuerst wird
ausgehend von Harish-Chandra-Superpaaren ein
darstellungstheoretischer Zugang zur Kategorie der Lie-
Supergruppen auf seine Eindeutigkeit untersucht. In einem
fundamentalen Beispiel findet sich eine Parametrisierung der so
gewonnenen Strukturen. Diese stehen im Zusammenhang zu speziellen
Wirkungen von Lie-Supergruppen. Des Weiteren ist es in bestimmten
geometrischen Situationen möglich, Superdifferentialoperatoren auf
Superuntermannigfaltigkeiten einzuschränken. Hier wird der
Laplace-Operator analysiert und sein radialer Anteil bestimmt.
Zusammen mit einer komplex-analytischen Version von Kostants
Lie-Hopf-Superalgebra-Konstruktion von Lie Supergruppen und einer
Wurzelraum-Torus-Zerlegung für Lie Supergruppen vom Typ I ergibt
sich eine lokale Version von Berezins Formel für radiale Anteile
von Laplace-
Casimir-Operatoren.
Advisors/Committee Members: Mathematik.
Subjects/Keywords: Supergruppe; Funktionentheorie; Darstellungstheorie;
Laplace-Operator; Casimir-Operator
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APA ·
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APA (6th Edition):
Kalus, M. (2011). Complex analytic aspects of Lie supergroups. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31373
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):
Kalus, Matthias. “Complex analytic aspects of Lie supergroups.” 2011. Thesis, Ruhr Universität Bochum. Accessed March 07, 2021.
http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31373.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalus, Matthias. “Complex analytic aspects of Lie supergroups.” 2011. Web. 07 Mar 2021.
Vancouver:
Kalus M. Complex analytic aspects of Lie supergroups. [Internet] [Thesis]. Ruhr Universität Bochum; 2011. [cited 2021 Mar 07].
Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31373.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalus M. Complex analytic aspects of Lie supergroups. [Thesis]. Ruhr Universität Bochum; 2011. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31373
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Technical University of Lisbon
8.
Dias, Verónica Raquel Barroso.
Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D.
Degree: 2013, Technical University of Lisbon
URL: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6119
► Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
Habitat degradation associated with river regulation, consequence increasing human demands on water…
(more)
▼ Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
Habitat degradation associated with river regulation, consequence increasing human demands on water resources, and result is changed richness and diversity fish species. Projects ecological habitat to improve becomes a priority for authorities in many countries.
In the present study, a methodology based on the relationship between fish habitat and stream flows, is applied in order to determine impact the regulate flows to species. A new approach based on fuzzy sets and rules, linguistic rules describe the imprecise information which often characterizing ecological data and enable implementing the interactions between physical variables. The habitat selection of several species can be predicted adequately based on expert knowledge.
Analyzed the Odelouca River, in the south-west of Portugal, when applied the CasimirFish2D model habitat to a stream downstream Odelouca Dam and the fish habitat was determined for two endemic cyprinids species, Iberian chub (Squalius aradensis) and Iberian nase (Iberochondrostoma almacai).
The results validated that decrease in availability habitat exists, and changes according to ontogeny. Casimir is a good alternative to others habitat models and may be having a good applicability in fluvial restoration studies.
Advisors/Committee Members: Cardoso, Maria Teresa Ferreira da Cunha, Santos, José Maria Horta e Costa Silva.
Subjects/Keywords: fluzzy; modelling; 2-D dimentional; habitat; Casimir
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APA (6th Edition):
Dias, V. R. B. (2013). Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D. (Thesis). Technical University of Lisbon. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6119
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):
Dias, Verónica Raquel Barroso. “Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D.” 2013. Thesis, Technical University of Lisbon. Accessed March 07, 2021.
https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6119.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dias, Verónica Raquel Barroso. “Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D.” 2013. Web. 07 Mar 2021.
Vancouver:
Dias VRB. Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D. [Internet] [Thesis]. Technical University of Lisbon; 2013. [cited 2021 Mar 07].
Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6119.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dias VRB. Modelação bidimensional de habitats fluviais para espécies piscícolas. Aplicação do Modelo CasimirFish2D. [Thesis]. Technical University of Lisbon; 2013. Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6119
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Oregon
9.
Cook, Eryn.
Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials.
Degree: PhD, Department of Physics, 2018, University of Oregon
URL: http://hdl.handle.net/1794/23192
► Casimir and Casimir-Polder effects are forces between electrically neutral bodies and particles in vacuum, arising entirely from quantum fluctuations. The modification to the vacuum electromagnetic-field…
(more)
▼ Casimir and
Casimir-Polder effects are forces between electrically neutral bodies and particles in vacuum, arising entirely from quantum fluctuations. The modification to the vacuum electromagnetic-field modes imposed by the presence of any particle or surface can result in these mechanical forces, which are often the dominant interaction at small separations. These effects play an increasingly critical role in the operation of micro- and nano-mechanical systems as well as miniaturized atomic traps for precision sensors and quantum-information devices. Despite their fundamental importance, calculations present theoretical and numeric challenges, and precise atom-surface potential measurements are lacking in many geometric and distance regimes.
The spectroscopic measurement of
Casimir-Polder-induced energy level shifts in optical-lattice trapped atoms offers a new experimental method to probe atom-surface interactions. Strontium, the current front-runner among optical frequency metrology systems, has demonstrated characteristics ideal for such precision measurements. An alkaline earth atom possessing ultra-narrow intercombination transitions, strontium can be loaded into an optical lattice at the “magic” wavelength where the probe transition is unperturbed by the trap light. Translation of the lattice will permit controlled transport of tightly-confined atomic samples to well-calibrated atom- surface separations, while optical transition shifts serve as a direct probe of the
Casimir-Polder potential.
We have constructed a strontium magneto-optical trap (MOT) for future
Casimir-Polder experiments. This thesis will describe the strontium apparatus, initial trap performance, and some details of the proposed measurement procedure.
Advisors/Committee Members: Steck, Daniel (advisor).
Subjects/Keywords: Casimir Polder; Magneto-optical trap; Strontium
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APA ·
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MLA ·
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Export
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Manager
APA (6th Edition):
Cook, E. (2018). Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials. (Doctoral Dissertation). University of Oregon. Retrieved from http://hdl.handle.net/1794/23192
Chicago Manual of Style (16th Edition):
Cook, Eryn. “Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials.” 2018. Doctoral Dissertation, University of Oregon. Accessed March 07, 2021.
http://hdl.handle.net/1794/23192.
MLA Handbook (7th Edition):
Cook, Eryn. “Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials.” 2018. Web. 07 Mar 2021.
Vancouver:
Cook E. Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials. [Internet] [Doctoral dissertation]. University of Oregon; 2018. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1794/23192.
Council of Science Editors:
Cook E. Laser Cooling and Trapping of Neutral Strontium for Spectroscopic Measurements of Casimir-Polder Potentials. [Doctoral Dissertation]. University of Oregon; 2018. Available from: http://hdl.handle.net/1794/23192
Georgia Tech
10.
Liu, Xianglei.
Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials.
Degree: PhD, Mechanical Engineering, 2016, Georgia Tech
URL: http://hdl.handle.net/1853/54960
► All substances above zero kelvin temperature emit fluctuating electromagnetic waves due to the random motions of charge carriers. Controlling the spectral and directional radiative properties…
(more)
▼ All substances above zero kelvin temperature emit fluctuating electromagnetic waves due to the random motions of charge carriers. Controlling the spectral and directional radiative properties of surfaces has wide applications in energy harvesting and thermal management. Artificial metamaterials have attracted much attention in the last decade due to their unprecedented optical and thermal properties beyond those existing in nature. This dissertation aims at tailoring radiative properties at infrared regime and enhancing the near-field radiative heat transfer by employing metamaterials. A comprehensive study is performed to investigate the extraordinary transmission, negative refraction, and tunable perfect absorption of infrared light. A polarizer is designed with an extremely high extinction ratio based on the extraordinary transmission through perforated metallic films. The extraordinary transmission of metallic gratings can be enhanced and tuned if a single layer of graphene is covered on top. Metallic metamaterials are not the unique candidate supporting exotic optical properties. Thin films of doped silicon nanowires can support negative refraction of infrared light due to the presence of hyperbolic dispersion. Long doped-silicon nanowires are found to exhibit broadband tunable perfect absorption. Besides the unique far-field properties, near-field radiative heat transfer can be mediated by metamaterials. Bringing objects with different temperatures close can enhance the radiative heat flux by orders of magnitude beyond the limit set by the Stefan-Boltzmann law. Metamaterials provide ways to make the energy transport more efficient. Very high radiative heat fluxes are shown based on carbon nanotubes, nanowires, and nanoholes using effective medium theory (EMT). The quantitative application condition of EMT is presented for metallodielectric metamaterials. Exact formulations including the scattering theory and Green’s function method are employed to investigate one- and two-dimensional gratings as well as metasurfaces when the period is not sufficiently small. New routes for enhancing near-field radiative energy transport are opened based on proposed hybridization of graphene plasmons with hyperbolic modes, hybridization of graphene plasmons with surface phonon modes, or hyperbolic graphene plasmons with open surface plasmon dispersion relation. Noncontact solid-state refrigeration is theoretically demonstrated to be feasible based on near-field thermal radiation. In addition, the investigation of near-field momentum exchange (
Casimir force) between metamaterials is also conducted. Simultaneous enhancement of the near-field energy transport and suppress of the momentum exchange is theoretically achieved. A design based on repulsive
Casimir force is proposed to achieve tunable stable levitation. The dissertation helps to understand the fundamental radiative energy transport and momentum exchange of metamaterials, and has significant impacts on practical applications such as design of nanoscale thermal and optical…
Advisors/Committee Members: Zhang, Zhuomin (advisor), Cola, Baratunde A. (committee member), Kumar, Satish (committee member), Maldovan, Martin (committee member), Filler, Michael (committee member).
Subjects/Keywords: Near-field thermal radiation; Metamaterials; Casimir interaction
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APA (6th Edition):
Liu, X. (2016). Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54960
Chicago Manual of Style (16th Edition):
Liu, Xianglei. “Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials.” 2016. Doctoral Dissertation, Georgia Tech. Accessed March 07, 2021.
http://hdl.handle.net/1853/54960.
MLA Handbook (7th Edition):
Liu, Xianglei. “Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials.” 2016. Web. 07 Mar 2021.
Vancouver:
Liu X. Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1853/54960.
Council of Science Editors:
Liu X. Tailoring thermal radiative properties and enhancing near-field radiative heat flux with electromagnetic metamaterials. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/54960
University of North Texas
11.
Dahal, Rabin.
Centers of Invariant Differential Operator Algebras for Jacobi Groups of Higher Rank.
Degree: 2013, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc283833/
► Let G be a Lie group acting on a homogeneous space G/K. The center of the universal enveloping algebra of the Lie algebra of G…
(more)
▼ Let G be a Lie group acting on a homogeneous space G/K. The center of the universal enveloping algebra of the Lie algebra of G maps homomorphically into the center of the algebra of differential operators on G/K invariant under the action of G. In the case that G is a Jacobi Lie group of rank 2, we prove that this homomorphism is surjective and hence that the center of the invariant differential operator algebra is the image of the center of the universal enveloping algebra. This is an extension of work of Bringmann, Conley, and Richter in the rank 1case.
Advisors/Committee Members: Conley, Charles H., Cherry, William, 1966-, Richter, Olav.
Subjects/Keywords: Invariant differential operator; Jacobi group; Casimir element
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University of Oklahoma
12.
Li, Yang.
CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS.
Degree: PhD, 2020, University of Oklahoma
URL: http://hdl.handle.net/11244/324288
► Any phenomenon caused by the nontrivial vacuum state of quantum fields in the presence of boundaries, nontrivial topology, varying background potentials, spacetime curvature, ect, could…
(more)
▼ Any phenomenon caused by the nontrivial vacuum state of quantum fields in the presence of boundaries, nontrivial topology, varying background potentials, spacetime curvature, ect, could be referred to as a
Casimir effect. Besides the quantum fluctuation, at a finite temperature,
Casimir effects can be significantly modified by the thermal fluctuation. This dissertation is devoted to the study of
Casimir effects and their thermodynamical properties. Based on our research, we mainly focus on three topics, namely
Casimir stresses and forces in inhomogeneous media,
Casimir entropies, and classical and quantum frictions.
Advisors/Committee Members: Milton, Kimball (advisor), Baron, Eddie (committee member), Baer, Howie (committee member), Uchoa, Bruno (committee member), Remling, Christian (committee member), Milton, Kimball (committee member).
Subjects/Keywords: Casimir effect; quantum fluctuation; thermal fluctuation
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APA (6th Edition):
Li, Y. (2020). CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/324288
Chicago Manual of Style (16th Edition):
Li, Yang. “CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS.” 2020. Doctoral Dissertation, University of Oklahoma. Accessed March 07, 2021.
http://hdl.handle.net/11244/324288.
MLA Handbook (7th Edition):
Li, Yang. “CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS.” 2020. Web. 07 Mar 2021.
Vancouver:
Li Y. CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS. [Internet] [Doctoral dissertation]. University of Oklahoma; 2020. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/11244/324288.
Council of Science Editors:
Li Y. CASIMIR EFFECT: QUANTUM FLUCTUATIONS AND THERMAL FLUCTUATIONS. [Doctoral Dissertation]. University of Oklahoma; 2020. Available from: http://hdl.handle.net/11244/324288
Miami University
13.
Hassan, Arkan Mahmood.
Dynamical Casimir Effect Using Two Photon Absorber.
Degree: MS, Physics, 2018, Miami University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766
► A single-photon-absorber (SPA) atom conned in a cavity quantum electrodynamic (CQED)has been studied in detail since the mid 80s. The study of the SPA atom…
(more)
▼ A single-photon-absorber (SPA) atom conned in a cavity
quantum electrodynamic (CQED)has been studied in detail since the
mid 80s. The study of the SPA atom has been done onboth
experimental and theoretical levels using CQED and \regular"
Jaynes-Cummings model(RJCM), respectively. The RJCM is the simplest
theoretical model in quantum optics todescribe the interaction of
the two-level atom (TLA) system with quantized mode of
opticalcavity. In this thesis, after reproducing results for RJCM,
we study a two-photon-absorberatom trapped in cavity QED with two
dierent methods of pumping photons to the cavity.The rst method of
adding photons to the cavity is using external laser and the
secondmethod is generating pairs of photons by moving one of the
cavity mirrors back and forth(dynamic
Casimir eect). At the end, we
compare the results from all three cases to see thesimilarities,
dierences, and if it is possible to enhance the detection of moving
mirrors usingTPA atom, i.e., to build a better gravitational wave
detector using TPA atom.
Advisors/Committee Members: Rice , Perry (Advisor).
Subjects/Keywords: Physics; Two Photon Absorber; Casimir Effect
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APA (6th Edition):
Hassan, A. M. (2018). Dynamical Casimir Effect Using Two Photon Absorber. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766
Chicago Manual of Style (16th Edition):
Hassan, Arkan Mahmood. “Dynamical Casimir Effect Using Two Photon Absorber.” 2018. Masters Thesis, Miami University. Accessed March 07, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766.
MLA Handbook (7th Edition):
Hassan, Arkan Mahmood. “Dynamical Casimir Effect Using Two Photon Absorber.” 2018. Web. 07 Mar 2021.
Vancouver:
Hassan AM. Dynamical Casimir Effect Using Two Photon Absorber. [Internet] [Masters thesis]. Miami University; 2018. [cited 2021 Mar 07].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766.
Council of Science Editors:
Hassan AM. Dynamical Casimir Effect Using Two Photon Absorber. [Masters Thesis]. Miami University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766
14.
De Aquino Carvalho, Joao Carlos.
Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity.
Degree: Docteur es, Physique, 2018, Sorbonne Paris Cité
URL: http://www.theses.fr/2018USPCD054
► Nous décrivons dans cette thèse des mesures spectroscopiques de réflexion sélective qui mettent en évidence les effets thermiques de l'interaction Casimir-Polder entre atome et surface.…
(more)
▼ Nous décrivons dans cette thèse des mesures spectroscopiques de réflexion sélective qui mettent en évidence les effets thermiques de l'interaction Casimir-Polder entre atome et surface. En régime de champ proche, cette interaction est gouvernée par un potentiel qui décroit avec le cube de la distance entre l'atome et la surface (régime van der Waals -vdW-de type dipôle-dipôle). Nous nous intéressons notamment aux niveaux excités du césium Cs (7P₁/₂) et Cs (7P₃/₂), qui possèdent un couplage dipolaire avec Cs (6D) à, respectivement, 12,15 µm et ~15 µm, interagissant avec une surface de saphir thermiquement émissive dont les modes émetteurs sont situés autour de 12,2 µm. Ainsi, ces niveaux respectifs niveaux sont sensibles à une interaction vdW résonante, ou non-résonante, que nous comparons expérimentalement Le résultat le plus important de cette thèse est l'observation expérimentale de la différence de comportement du potentiel vdW en fonction de la température de fenêtre (150-800 °C), pour les niveaux Cs(7P₁/₂) et Cs (7P₃/₂). Pour le niveau Cs (7P₁/₂) le potentiel vdW augment en fonction de la température, tandis que pour le niveau une légère décroissance est observée. Des expériences de spectroscopie de réflexion sélective sondant le niveau Cs (6P₁/₂), interagissant avec une surface de saphir chaude, ont aussi été réalisées, qui confirment pour ce niveau l'absence d'effet de température. Les prédictions théoriques sont raffinées par l'évaluation de la constante diélectrique du saphir en fonction de la température, à partir de données nouvelles d'émissivité fournies par le groupe CEMHTI à Orléans. Enfin, utilisant la fluorescence rétrodiffuse comme diagnostic pour la cellule chaude de Cs lorsque l'excitation était faite sur les niveaux Cs (6P ₁/₂) et Cs (7P ₁/₂), nous avons interprété de façon plus consistante que les propositions précédentes de la littérature, des structures sub-Doppler observées dans l'excitation de la fluorescence au voisinage de la fenêtre.
In this thesis we describe measurements of selective reflection spectroscopy that highlight the thermal effects of the Casimir-Polder interaction between atom and surface. In the near field regime, this interaction is governed by a potential decreasing with the cube of the distance between the atom and the surface (van der Waals -vdW- regime of dipoledipole type) We are particularly interested in the excited levels of cesium, we are particularly interested in the excited levels of cesium Cs (7P₁/₂) and Cs (7P₃/₂), which have a dipole coupling to respectively Cs (6D) at 12,15 µm and ~15 µm interacting with a thermally emissive sapphire surface. Sapphire emitting modes are around 12,2 µm, and, thus, these Cs levels are sensitive to a resonant, or non-resonant, vdW interaction. We compare experimentally these levels. The most important result of this thesis is the experimental observation of the difference in behavior of the vdW potential as a function of the window temperature (150 - 800 °C), for the Cs (7P₁/₂) and Cs (7P₃/₂) levels. For the Cs (7P₁/₂) level…
Advisors/Committee Members: Bloch, Daniel (thesis director).
Subjects/Keywords: Réflexion Sélective; Interaction Casimir-Polder; Effets thermiques; Selective Reflexion; Casimir-Polder Interaction; Thermal Effects
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De Aquino Carvalho, J. C. (2018). Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity. (Doctoral Dissertation). Sorbonne Paris Cité. Retrieved from http://www.theses.fr/2018USPCD054
Chicago Manual of Style (16th Edition):
De Aquino Carvalho, Joao Carlos. “Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity.” 2018. Doctoral Dissertation, Sorbonne Paris Cité. Accessed March 07, 2021.
http://www.theses.fr/2018USPCD054.
MLA Handbook (7th Edition):
De Aquino Carvalho, Joao Carlos. “Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity.” 2018. Web. 07 Mar 2021.
Vancouver:
De Aquino Carvalho JC. Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity. [Internet] [Doctoral dissertation]. Sorbonne Paris Cité; 2018. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2018USPCD054.
Council of Science Editors:
De Aquino Carvalho JC. Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive : Casimir-Polder interaction between caesium atoms and saphir's surface thermally emissivity. [Doctoral Dissertation]. Sorbonne Paris Cité; 2018. Available from: http://www.theses.fr/2018USPCD054
15.
Hilico, Adèle.
Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances.
Degree: Docteur es, Physique, 2014, Paris, Ecole normale supérieure
URL: http://www.theses.fr/2014ENSU0007
► Ce mémoire présente la réalisation d'un dispositif expérimental de deuxième génération pour le projet FORCA-G (FORce de CAsimir et Gravitation à courte distance). L'objectif de…
(more)
▼ Ce mémoire présente la réalisation d'un dispositif expérimental de deuxième génération pour le projet FORCA-G (FORce de CAsimir et Gravitation à courte distance). L'objectif de ce projet est la mesure des interactions à faible distance entre un atome et une surface massive. La mesure de force est réalisée à l'aide d'interféromètres atomiques utilisant des atomes confinés dans un réseau optique 1D vertical basé sur le déplacement des atomes de puits en puits. La dégénérescence des niveaux d'énergies des atomes dans les puits du réseau est levée par la force que l'on cherche à mesurer. Des transitions Raman permettent de séparer les atomes dans des puits adjacents, puis de les recombiner, créant ainsi un interféromètre atomique qui permet de mesurer la différence d'énergie entre puits, liée à la fréquence de Bloch nu B du réseau. Ce travail présente la mise en place d'un dispositif proprement dédié au projet, qui permettra à terme de mesurer les forces à faible distance. Il rend compte des améliorations obtenues en configuration de gravimètre sur la sensibilité court terme de la mesure qui atteint 5. 10^-6 à 1 s. Il regroupe l'étude des limitations de la sensibilité, de l'exactitude et l'étude de la perte de contraste des interféromètres. Il présente aussi la mise en place d'une étape supplémentaire : l'implémentation d'un piège dipolaire visant obtenir un échantillon d'atomes plus dense et plus froid.
The thesis presents the set up of the second version of the experiment FORCA-G (CAsimir FORce and Gravitation at short range). The purpose of this experiment is the measurement of short-range interactions between an atom and a massive surface. The measurement is realised thanks to atom interferometers using atoms trapped in a 1D vertical optical lattice. The energy levels of atoms in such a trap are shifted from lattice site to another by the force we aim at measuring. We move the atoms from site to site using counter-propagating Raman transitions. The atoms are moved from Δm lattice sites only if the Raman frequency matches υHFS +∆m.υB where υHFS is the frequency of the hyperfine ground state transition and υB is the Bloch frequency and represents the difference of potential energy between two wells in the case where the atoms are far from the surface. This thesis presents the implementation of a setup properly dedicated to FORCA-G in which the measurement of short-range forces will be possible. It reaches an improved short-term relative sensitivity on the measurement of the Bloch frequency of at 3.9 10-6 at 1s. It contains the studies of the limits in the sensitivity, the accuracy and the contrast losses. It also presents the implementation of a dipolar trap to further cool the atoms and increase their density (crossed dipolar trap with a 1064 broadband laser).
Advisors/Committee Members: Pereira Dos Santos, Franck (thesis director).
Subjects/Keywords: Interférométrie atomique; Casimir-Polder; Métrologie; Atomes froids; Atom interferometry; Casimir-Polder; Metrology; Cold atoms; 539
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APA (6th Edition):
Hilico, A. (2014). Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances. (Doctoral Dissertation). Paris, Ecole normale supérieure. Retrieved from http://www.theses.fr/2014ENSU0007
Chicago Manual of Style (16th Edition):
Hilico, Adèle. “Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances.” 2014. Doctoral Dissertation, Paris, Ecole normale supérieure. Accessed March 07, 2021.
http://www.theses.fr/2014ENSU0007.
MLA Handbook (7th Edition):
Hilico, Adèle. “Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances.” 2014. Web. 07 Mar 2021.
Vancouver:
Hilico A. Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances. [Internet] [Doctoral dissertation]. Paris, Ecole normale supérieure; 2014. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2014ENSU0007.
Council of Science Editors:
Hilico A. Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances : Force sensor with atoms trapped in an optical lattice : characterisation of the performances. [Doctoral Dissertation]. Paris, Ecole normale supérieure; 2014. Available from: http://www.theses.fr/2014ENSU0007
Virginia Tech
16.
Cho, Sung Nae.
Casimir Force in Non-Planar Geometric Configurations.
Degree: PhD, Physics, 2004, Virginia Tech
URL: http://hdl.handle.net/10919/11156
► The Casimir force for charge-neutral, perfect conductors of non-planar geometric configurations have been investigated. The configurations were: (1) the plate-hemisphere, (2) the hemisphere-hemisphere and (3)…
(more)
▼ The
Casimir force for charge-neutral, perfect conductors of non-planar geometric configurations have been investigated. The configurations were: (1) the plate-hemisphere, (2) the hemisphere-hemisphere and (3) the spherical shell. The resulting
Casimir forces for these physical arrangements have been found to be attractive. The repulsive
Casimir force found by Boyer for a spherical shell is a special case requiring stringent material property of the sphere, as well as the specific boundary conditions for the wave modes inside and outside of the sphere. The necessary criteria in detecting Boyer's repulsive
Casimir force for a sphere are discussed at the end of this thesis.
Advisors/Committee Members: Mizutani, Tetsuro (committeechair), Ficenec, John R. (committee member), Ritter, Alfred L. (committee member), Tauber, Uwe C. (committee member), Gibson, Harry W. (committee member).
Subjects/Keywords: Dynamical Casimir Force; Quantum Electrodynamics (QED); Vacuum Energy; Casimir Force; Casimir Effect
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APA (6th Edition):
Cho, S. N. (2004). Casimir Force in Non-Planar Geometric Configurations. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/11156
Chicago Manual of Style (16th Edition):
Cho, Sung Nae. “Casimir Force in Non-Planar Geometric Configurations.” 2004. Doctoral Dissertation, Virginia Tech. Accessed March 07, 2021.
http://hdl.handle.net/10919/11156.
MLA Handbook (7th Edition):
Cho, Sung Nae. “Casimir Force in Non-Planar Geometric Configurations.” 2004. Web. 07 Mar 2021.
Vancouver:
Cho SN. Casimir Force in Non-Planar Geometric Configurations. [Internet] [Doctoral dissertation]. Virginia Tech; 2004. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10919/11156.
Council of Science Editors:
Cho SN. Casimir Force in Non-Planar Geometric Configurations. [Doctoral Dissertation]. Virginia Tech; 2004. Available from: http://hdl.handle.net/10919/11156
17.
Maury, Axel.
Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice.
Degree: Docteur es, Physique, 2016, Université Pierre et Marie Curie – Paris VI
URL: http://www.theses.fr/2016PA066327
► Ce travail de thèse présente la modélisation théorique de l'expérience FORCA-G. L'objectif de cette expérience est la mesure des interactions à courte portée entre des…
(more)
▼ Ce travail de thèse présente la modélisation théorique de l'expérience FORCA-G. L'objectif de cette expérience est la mesure des interactions à courte portée entre des atomes piégés dans un réseau optique et une surface massive à une grande précision. Nous nous sommes intéressés plus particulièrement à l'effet Casimir-Polder induit par la surface sur les atomes. Le but était de fournir la prédiction la plus précise possible des états atomiques. Ceci a consisté à considérer les effets de la température sur l'interaction Casimir-Polder et modéliser la surface de la manière la plus réaliste possible. Afin de résoudre le problème de divergence qu'impliquait un traitement perturbatif de l'interaction atome-surface, nous avons développé une méthode numérique pour un traitement non-perturbatif de l'interaction Casimir-Polder et modélisé l'interaction atome-surface à très courte distance par un potentiel de Lennard-Jones. Chaque effet et incertitude sur les états atomiques ont été évalués afin de déterminer s'ils seraient observables ou un facteur limitant en regard de la précision visée par l'expérience. Enfin nous nous sommes intéressés au cas d'un déséquilibre thermique entre la température du miroir et la température de l'environnement qui pourrait être induit par les lasers en présence ou un laser de chauffage. Nous avons calculé la correction du potentiel Casimir-Polder due au déséquilibre et évalué l'effet sur les niveaux d'énergie atomiques pour déterminer si cet effet pouvait être mesuré.
This thesis presents the theoretical modeling of the experiment FORCA-G. The purpose of this experiment is to measure short-range interactions between trapped atoms in an optical lattice and a massive surface with a high precision. We are focused on Casimir-Polder effect induced by the surface on the atoms. The aim was to give the most possible precise prediction of atomic states. This work took the temperature effects on Casimir-Polder interaction into account, modelled the surface of the experiment. In order to solve the divergence problem due to the perturbative treatment of the atom-surface interaction, we developed a digital method for a non-perturbative treatment of the Casimir-Polder interaction and modelled the short-range atom-surface interaction by a Lennard-Jones potential. Each effect and uncertainties on the atomic states were evaluated so that we know if they could be observable or a limiting factor compared to the experiment precision. Finally we were focused on an out of thermal equilibrium situation between the miroir and environment temperature which may be induced by the lasers. We computed the correction to the Casimir-Polder potential due to this disequilibrium and evaluated the effect on the atomic states.
Advisors/Committee Members: Guérout, Romain (thesis director), Lambrecht, Astrid (thesis director).
Subjects/Keywords: Interaction Casimir-Polder; Interaction Casimir-Polder en déséquilibre thermique; Potentiel de Lennard-Jones; Réseau optique; État Wannier-Stark; Miroir multi-couche; Casimir-Polder interaction; Lennard-Jones potential; Optical lattice; 539.7
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Maury, A. (2016). Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice. (Doctoral Dissertation). Université Pierre et Marie Curie – Paris VI. Retrieved from http://www.theses.fr/2016PA066327
Chicago Manual of Style (16th Edition):
Maury, Axel. “Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice.” 2016. Doctoral Dissertation, Université Pierre et Marie Curie – Paris VI. Accessed March 07, 2021.
http://www.theses.fr/2016PA066327.
MLA Handbook (7th Edition):
Maury, Axel. “Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice.” 2016. Web. 07 Mar 2021.
Vancouver:
Maury A. Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice. [Internet] [Doctoral dissertation]. Université Pierre et Marie Curie – Paris VI; 2016. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2016PA066327.
Council of Science Editors:
Maury A. Effet Casimir-Polder sur des atomes piégés : Casimir-Polder interaction of atoms trapped in a lattice. [Doctoral Dissertation]. Université Pierre et Marie Curie – Paris VI; 2016. Available from: http://www.theses.fr/2016PA066327
Johannes Gutenberg Universität Mainz
18.
Noruzifar, Ehsan.
Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids.
Degree: 2009, Johannes Gutenberg Universität Mainz
URL: http://ubm.opus.hbz-nrw.de/volltexte/2009/2138/
► We study the effective interaction between two ellipsoidal particles at the interface of two fluid phases which are mediated by thermal fluctuations of the interface.…
(more)
▼ We study the effective interaction between two ellipsoidal particles at the interface of two fluid phases which are mediated by thermal fluctuations of the interface. Within a coarse-grained picture, the properties of fluid interfaces are very well described by an effective capillary wave Hamiltonian which governs both the equilibrium interface configuration and the thermal fluctuations (capillary waves) around this equilibrium (or mean-field) position. As postulated by the Goldstone theorem the capillary waves are long-range correlated. The interface breaks the continuous translational symmetry of the system, and in the limit of vanishing external fields - like gravity - it has to be accompanied by easily excitable long wavelength (Goldstone) modes – precisely the capillary waves. In this system the restriction of the long-ranged interface fluctuations by particles gives rise to fluctuation-induced forces which are equivalent to interactions of Casimir type and which are anisotropic in the interface plane. Since the position and the orientation of the colloids with respect to the interface normal may also fluctuate, this system is an example for the Casimir effect with fluctuating boundary conditions. In the approach taken here, the Casimir interaction is rewritten as the interaction between fluctuating multipole moments of an auxiliary charge density-like field defined on the area enclosed by the contact lines. These fluctuations are coupled to fluctuations of multipole moments of the contact line position (due to the possible position and orientational fluctuations of the colloids). We obtain explicit expressions for the behavior of the Casimir interaction at large distances for arbitrary ellipsoid aspect ratios. If colloid fluctuations are suppressed, the Casimir interaction at large distances is isotropic, attractive and long ranged (double-logarithmic in the distance). If, however, colloid fluctuations are included, the Casimir interaction at large distances changes to a power law in the inverse distance and becomes anisotropic. The leading power is 4 if only vertical fluctuations of the colloid center are allowed, and it becomes 8 if also orientational fluctuations are included.
Wir untersuchen für zwei ellipsodalen Teilchen an der Grenzfläche zweier fluider Phasen die effektive Wechselwirkung, welche durch thermische Fluktuationen der Grenzfläche übertragen wird. Innerhalb eines Vergröberungsbildes werden die Eigenschaften von fluiden Grenzflächen sehr gut durch einen effektiven Kapillarwellen-Hamiltonian beschrieben, welcher sowohl die Konfiguration der Gleichgewichtsgrenzfläche als auch die thermischen Fluktuationen (Kapillarwellen) um diese Gleichgewichtsposition beschreibt. Wie vom Goldstone-Theorem vorausgesagt, sind die Kapillarwellen langreichweitig korrelliert. Die Grenzfläche bricht die kontinuierliche Translationssymmetrie des Systems und muss im Grenzfall verschwindender externer Felder - wie z.B. der Gravitation - begleitet werden von leicht anregbaren langwelligen (Goldstone)-Moden -…
Subjects/Keywords: Casimir Effekt, Ellipsoidale Teilchen, Kolloide an Grenzflächen; Casimir effect, ellipsoidal particles, colloids at fluid interfaces; Physics
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APA (6th Edition):
Noruzifar, E. (2009). Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2009/2138/
Chicago Manual of Style (16th Edition):
Noruzifar, Ehsan. “Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids.” 2009. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 07, 2021.
http://ubm.opus.hbz-nrw.de/volltexte/2009/2138/.
MLA Handbook (7th Edition):
Noruzifar, Ehsan. “Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids.” 2009. Web. 07 Mar 2021.
Vancouver:
Noruzifar E. Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2009. [cited 2021 Mar 07].
Available from: http://ubm.opus.hbz-nrw.de/volltexte/2009/2138/.
Council of Science Editors:
Noruzifar E. Thermal Casimir effect at fluid interfaces: Fluctuation-induced forces between anisotropic colloids. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2009. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2009/2138/
19.
Fialkovskiy, Ignat.
Efeito Casimir e as propriedades óticas do grapheno.
Degree: PhD, Física, 2012, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/
;
► Este trabalho é dedicado à investigação de diferentes aspectos da física de monocamadas de grafeno suspenso e epitaxial. A descrição do grafeno é baseada no…
(more)
▼ Este trabalho é dedicado à investigação de diferentes aspectos da física de monocamadas de grafeno suspenso e epitaxial. A descrição do grafeno é baseada no modelo quase-relativístico de Dirac. Isso permite a aplicação dos métodos da Teoria Quântica de Campos (TQC) na investigação dos efeitos de interação entre o grafeno e o campo eletromagnético (EM). Usando o formalismo de integral de trajetória, nós formulamos uma teoria efetiva do campo EM na presença de monocamadas de grafeno. Esta teoria é governada pelo operador de polarização das quase-partículas de Dirac. Dois fenômenos importantes são investigados: as propriedades óticas do grafeno (o efeito Faraday em particular) e a interação de Casimir entre uma camada de grafeno e um metal paralelo. Em primeiro lugar, estudamos a propagação de ondas eletromagnéticas na presença de camadas de grafeno. A dinâmica de ondas é governada pelas equações modificadas de Maxwell obtidas a partir da teoria efetiva para o campo EM. Nós calculamos os coeficientes de reflexão e transmissão de luz polarizada linearmente e investigamos detalhadamente o efeito quântico de Faraday no campo magnético externo. Em particular, mostramos que as previsões do modelo de Dirac estão em boa concordância com os recentes resultados experimentais sobre a transmissão de luz e rotação de Faraday gigante em regime de ressonância cíclotron. Novos regimes também são previstos. Em segundo lugar, investigamos a interação de Casimir entre filmes suspensos de grafeno com um condutor ideal. O efeito é investigado tanto no caso ideal (temperatura nula, amostras ideais) quanto para configurações mais realistas (temperatura não nula e a presença de potencial químico). No caso de temperatura nula, a força de Casimir entre grafeno e condutor ideal é aproximadamente 2.6% da força entre dois condutores ideais. Ao mesmo tempo, no limite de temperatura elevada, o efeito mostra-se ser muito forte cerca de 50% de efeito entre metais ideais.
This research is devoted to investigation of several aspects of the physics of suspended and epitaxial graphene monolayers. The description of graphene is based on the quasi – relativistic Dirac model which permits application of the methods of the Quantum Field Theory to investigation of the interaction of graphene with electromagnetic field. Basing on the path integral formalism we formulate the effective theory for EM field in presence of graphene monolayers which is governed by the polarization operator of the Dirac quasi-particles in graphene. The two main phenomena in the interaction of graphene with electromagnetic field are studied: the optical properties of graphene (the Faraday rotation in particular), and Casimir interaction between graphene samples and parallel metal. First, we study the propagation of electromagnetic waves in presence of suspended and epitaxial graphene layers. Their dynamics is governed by the modified Maxwell equations obtained from the effective theory for EM field. We calculate the reflection and transmission coefficient for linearly polarized…
Advisors/Committee Members: Guitman, Dmitri Maximovitch.
Subjects/Keywords: Casimir effec; efeito Casimir; efeito Faraday; Faraday effect; Grafeno; graphene; quantum field theory; teoria quântica de campos
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APA (6th Edition):
Fialkovskiy, I. (2012). Efeito Casimir e as propriedades óticas do grapheno. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/ ;
Chicago Manual of Style (16th Edition):
Fialkovskiy, Ignat. “Efeito Casimir e as propriedades óticas do grapheno.” 2012. Doctoral Dissertation, University of São Paulo. Accessed March 07, 2021.
http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/ ;.
MLA Handbook (7th Edition):
Fialkovskiy, Ignat. “Efeito Casimir e as propriedades óticas do grapheno.” 2012. Web. 07 Mar 2021.
Vancouver:
Fialkovskiy I. Efeito Casimir e as propriedades óticas do grapheno. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2021 Mar 07].
Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/ ;.
Council of Science Editors:
Fialkovskiy I. Efeito Casimir e as propriedades óticas do grapheno. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/ ;
Texas A&M University
20.
Liu, Zhonghai.
Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons.
Degree: PhD, Physics, 2010, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7251
► We study thoroughly Casimir energy and Casimir force in a rectangular cavity and piston with various boundary conditions, for both scalar field and electromagnetic (EM)…
(more)
▼ We study thoroughly
Casimir energy and
Casimir
force in a rectangular cavity and piston with various boundary
conditions, for both scalar field and electromagnetic (EM) field.
Using the cylinder kernel approach, we find the
Casimir energy
exactly and analyze the
Casimir energy and
Casimir force from the
point of view of closed classical paths (or optical paths). For the
scalar field, we study the rectangular cavity and rectangular piston
with all Dirichlet conditions and all Neumann boundary conditions
and then generalize to more general cases with any combination of
Dirichlet and Neumann boundary conditions. For the EM field, we
first represent the EM field by 2 scalar fields (Hertz potentials),
then relate the EM problem to corresponding scalar problems. We
study the case with all conducting boundary conditions and then
replace some conducting boundary conditions by permeable boundary
conditions. By classifying the closed classical paths into 4 kinds:
Periodic, Side, Edge and Corner paths, we can see the role played by
each kind of path. A general treatment of any combination of
boundary conditions is provided. Comparing the differences between
different kinds of boundary conditions and exploring the relation
between corresponding EM and scalar problems, we can understand the
effect of each kind of boundary condition and contribution of each
kind of classical path more clearly.
Advisors/Committee Members: Fulling, Stephen (advisor), Pope, Christopher (committee member), Saslow, Wayne (committee member), Kuchment, Peter (committee member).
Subjects/Keywords: Casimir effect; zero point energy; vacuum energy; Casimir piston
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APA (6th Edition):
Liu, Z. (2010). Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7251
Chicago Manual of Style (16th Edition):
Liu, Zhonghai. “Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons.” 2010. Doctoral Dissertation, Texas A&M University. Accessed March 07, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7251.
MLA Handbook (7th Edition):
Liu, Zhonghai. “Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons.” 2010. Web. 07 Mar 2021.
Vancouver:
Liu Z. Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons. [Internet] [Doctoral dissertation]. Texas A&M University; 2010. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7251.
Council of Science Editors:
Liu Z. Closed Path Approach to Casimir Effect in Rectangular Cavities and Pistons. [Doctoral Dissertation]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7251
Northeastern University
21.
Murugesan, Pradeep Ganesh.
Experimental implications of static and dynamic Casimir effect instabilities.
Degree: PhD, Department of Physics, 2009, Northeastern University
URL: http://hdl.handle.net/2047/d10018499
► When fluctuating electromagnetic fields in vacuum couple strongly with matter, under certain conditions, thermodynamic instability can arise. A general theoretical framework which addresses this problem…
(more)
▼ When fluctuating electromagnetic fields in vacuum couple strongly with matter, under certain conditions, thermodynamic instability can arise. A general theoretical framework which addresses this problem is derived, in this thesis. A deep connection is shown to exist between `scattering phase shifts', `bound states' and `thermodynamic instabilities'. The emergence of such instability in a ferroelectric composed of spin zero particles, interacting strongly with photons via electric dipole interactions, is thoroughly examined. When the field modes are modulated, under certain resonant conditions, theory predicts spontaneous generation of photons from the vacuum. The number of photons as predicted by such theories, diverge exponentially with the modulation. A general theoretical formalism which resolves this instability is provided in the thesis. The proposed experiment to detect dynamic Casimir effect, is modeled within this framework, and the number of photons that would be produced in the experiment is estimated.
Subjects/Keywords: Physics; Casimir effect; Condensed matter; Casimir effect; Physics
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APA (6th Edition):
Murugesan, P. G. (2009). Experimental implications of static and dynamic Casimir effect instabilities. (Doctoral Dissertation). Northeastern University. Retrieved from http://hdl.handle.net/2047/d10018499
Chicago Manual of Style (16th Edition):
Murugesan, Pradeep Ganesh. “Experimental implications of static and dynamic Casimir effect instabilities.” 2009. Doctoral Dissertation, Northeastern University. Accessed March 07, 2021.
http://hdl.handle.net/2047/d10018499.
MLA Handbook (7th Edition):
Murugesan, Pradeep Ganesh. “Experimental implications of static and dynamic Casimir effect instabilities.” 2009. Web. 07 Mar 2021.
Vancouver:
Murugesan PG. Experimental implications of static and dynamic Casimir effect instabilities. [Internet] [Doctoral dissertation]. Northeastern University; 2009. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/2047/d10018499.
Council of Science Editors:
Murugesan PG. Experimental implications of static and dynamic Casimir effect instabilities. [Doctoral Dissertation]. Northeastern University; 2009. Available from: http://hdl.handle.net/2047/d10018499
22.
Dufour, Gabriel.
Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential.
Degree: Docteur es, Physique, 2015, Université Pierre et Marie Curie – Paris VI
URL: http://www.theses.fr/2015PA066511
► Les collisions entre atomes ultrafroids et surfaces matérielles sont caractérisées par la réflexion de l'onde de matière atomique sur le potentiel attractif de Casimir-Polder. Cette…
(more)
▼ Les collisions entre atomes ultrafroids et surfaces matérielles sont caractérisées par la réflexion de l'onde de matière atomique sur le potentiel attractif de Casimir-Polder. Cette réflexion quantique est déterminante pour des expériences telles que GBAR, qui mesurera l'accélération d'un atome d'antihydrogène froid chutant vers une plaque de détection. Dans cette thèse, le potentiel de Casimir-Polder est calculé à partir des propriétés de diffusion électromagnétique de l'atome et de la surface. Il s'avère dépendre de la réponse diélectrique, de l'épaisseur et de la densité du milieu. Nous montrons que la réflexion sur ce potentiel est associée à une rupture de l'approximation semiclassique et qu'elle augmente pour des atomes lents et des potentiels faibles. Les transformations de Liouville relient des équations de Schrödinger avec des potentiels différents mais les mêmes amplitudes de diffusion. L'équivalence entre la réflexion quantique sur un puits de potentiel et l'effet tunnel à travers une barrière offre de nouvelles perspectives sur le problème. Nous discutons aussi des effets de la gravité sur le paquet d'onde atomique et de ses conséquences pour les expériences avec des atomes en chute libre. Associée à la réflexion quantique sur un miroir horizontal, la gravité permet de maintenir des particules dans des états à longue durée de vie aux applications prometteuses pour la métrologie. En particulier, nous proposons un système pour améliorer la précision de GBAR en réduisant la dispersion en vitesse des atomes d'antihydrogène.
Collisions between ultracold atoms and material surfaces are characterized by the reflection of the atomic matter wave from the attractive Casimir-Polder potential. This quantum reflection is particularly relevant to experiments such as GBAR, which will determine the gravitational acceleration of a cold antihydrogen atom by timing its fall onto a detection plate. In this thesis, the Casimir-Polder potential is computed from the electromagnetic scattering properties of the atom and surface and it is found to depend notably on the dielectric response, thickness and density of the medium. We show that reflection on this potential is associated with a breakdown of the semiclassical approximation and that it is enhanced for slow atoms and weak potentials. Liouville transformations relate Schrödinger equations with different potential landscapes but identical scattering properties. We gain new insights on the problem of quantum reflection on a potential well by mapping it onto an equivalent problem of tunneling through a wall. We also discuss the effect of gravity on the atomic wavepacket and its implications for free fall experiments with atoms. When combined with quantum reflection from a horizontal mirror, gravity can be used to trap particles in long lived states with promising applications for metrology. In particular, we suggest a scheme to improve the precision of the GBAR experiment by reducing the velocity dispersion of the falling atoms.
Advisors/Committee Members: Lambrecht, Astrid (thesis director).
Subjects/Keywords: Réflexion quantique; Interaction de Casimir-Polder; Antihydrogène; Gravitation; Équation de Schrödinger; Transformation de Liouville; Quantum reflexion; Casimir-Polder interaction; 530
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APA (6th Edition):
Dufour, G. (2015). Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential. (Doctoral Dissertation). Université Pierre et Marie Curie – Paris VI. Retrieved from http://www.theses.fr/2015PA066511
Chicago Manual of Style (16th Edition):
Dufour, Gabriel. “Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential.” 2015. Doctoral Dissertation, Université Pierre et Marie Curie – Paris VI. Accessed March 07, 2021.
http://www.theses.fr/2015PA066511.
MLA Handbook (7th Edition):
Dufour, Gabriel. “Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential.” 2015. Web. 07 Mar 2021.
Vancouver:
Dufour G. Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential. [Internet] [Doctoral dissertation]. Université Pierre et Marie Curie – Paris VI; 2015. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2015PA066511.
Council of Science Editors:
Dufour G. Réflexion quantique sur le potentiel de Casimir-Polder : Quantum reflection from the Casimir-Polder potential. [Doctoral Dissertation]. Université Pierre et Marie Curie – Paris VI; 2015. Available from: http://www.theses.fr/2015PA066511
23.
Crépin, Pierre-Philippe.
Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet.
Degree: Docteur es, Physique, 2019, Sorbonne université
URL: http://www.theses.fr/2019SORUS054
► Le cadre de cette thèse est celui de la collaboration GBAR, au CERN, qui a pour objectif de mesurer l’accélération de pesanteur de l’antimatière. Dans…
(more)
▼ Le cadre de cette thèse est celui de la collaboration GBAR, au CERN, qui a pour objectif de mesurer l’accélération de pesanteur de l’antimatière. Dans cette thèse, nous étudions la réflexion quantique de l’antihydrogène sur le détecteur, provoquée par l’interaction Casimir-Polder que nous calculons pour différents matériaux. Nous trouvons une réflexion quantique particulièrement élevée pour un atome d’antihydrogène sur une surface d’hélium liquide. Nous présentons ensuite une description complète des états quantiques gravitationnels, mêlant la gravité et l’interaction de Casimir-Polder. Nous revisitons pour cela la théorie des collisions dans le cas du potentiel de Casimir-Polder à travers une nouvelle "effective range theory", obtenue après transformée de Liouville. La connaissance des états quantiques gravitationnels nous amène à proposer une nouvelle méthode de mesure de l’accélération de pesanteur, en créant des interférences quantiques entre ces états. Une analyse statistique de la figure d’interférence ainsi obtenue est réalisée, conduisant à une amélioration de la précision jusqu’à trois ordres de grandeurs par rapport à l’expérience initiale de chute libre classique. Enfin, nous étudions en détail l’influence du désordre au niveau de la plaque de détection, celle-ci n’étant en réalité pas une surface parfaite. Nous calculons l’effet de ce désordre sur les fluctuations du potentiel de Casimir-Polder lui-même, et observons un comportement en loi différent pour les modèles de conductivité que sont le modèle plasma et le modèle de Drude.
The framework of this thesis is the GBAR collaboration at CERN, which aims to measure the free fall acceleration of antimatter . In this thesis, we study the quantum reflection of the antihydrogen on the detector, caused by the Casimir-Polder interaction that we calculate for different materials. We find a particularly high quantum reflection for an antihydrogen atom on a surface of liquid helium. We then present a complete description of the gravitational quantum states, mixing gravity and Casimir-Polder interaction. For this purpose, we revisit the theory of collisions in the case of the Casimir-Polder potential through a new "effective range theory", obtained after a Liouville transform. The knowledge of gravitational quantum states leads us to propose a new method of measuring free fall acceleration, by creating quantum interferences between these states. A statistical analysis of the interference pattern thus obtained is carried out, leading to an improvement in the accuracy until three orders of magnitude compared to the initial free-fall experiment. Finally, we study in detail the influence of the disorder at the level of the plate of detection, the latter being in fact not a perfect surface. We calculate the effect of this disorder on the fluctuations of the Casimir-Polder potential itself, and observe a different behavior in law for the conductivity models such as the plasma model and the Drude model.
Advisors/Committee Members: Reynaud, Serge (thesis director).
Subjects/Keywords: Réflexion quantique; Casimir-Polder; Antihydrogène; Gravitation; Transformée de Liouville; Fluctuations; Quantum reflection; Casimir-Polder; Antihydrogen; Gravitation; Liouville transform; 539.7
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APA (6th Edition):
Crépin, P. (2019). Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet. (Doctoral Dissertation). Sorbonne université. Retrieved from http://www.theses.fr/2019SORUS054
Chicago Manual of Style (16th Edition):
Crépin, Pierre-Philippe. “Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet.” 2019. Doctoral Dissertation, Sorbonne université. Accessed March 07, 2021.
http://www.theses.fr/2019SORUS054.
MLA Handbook (7th Edition):
Crépin, Pierre-Philippe. “Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet.” 2019. Web. 07 Mar 2021.
Vancouver:
Crépin P. Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet. [Internet] [Doctoral dissertation]. Sorbonne université; 2019. [cited 2021 Mar 07].
Available from: http://www.theses.fr/2019SORUS054.
Council of Science Editors:
Crépin P. Réflexion quantique d’un paquet d’onde d’antihydrogène refroidi : Quantum reflection of a cold antihydrogen wave packet. [Doctoral Dissertation]. Sorbonne université; 2019. Available from: http://www.theses.fr/2019SORUS054
24.
Gustavo Gazzola de Lima.
Teoria de Casimir para a energia escura revisitada.
Degree: 2009, Universidade Federal de Minas Gerais
URL: http://hdl.handle.net/1843/ESCZ-7YSJH2
► Neste trabalho, assumimos que "Energia Escura" (de uma "pequena" região do espaço no tempo cósmico presente) pode ser identificada como um sistema composto pelo vácuo…
(more)
▼ Neste trabalho, assumimos que "Energia Escura" (de uma "pequena" região do espaço no tempo cósmico presente) pode ser identificada como um sistema composto pelo vácuo e poucos estados de uma partícula de momento zero de um campo quântico escalar de massa 0. Sob tais condições, mostramos que uma teoria quântica de campos local produz um correspondente tensor momento-energia na forma de um fluido perfeito e que uma energia estritamente positiva, necessária para descrever a energia escura, pode ser achada apenas em regiões de dimensão linear L da ordem do comprimento de onda de Compton da partícula 1/ . Além de satisfazer a densidade de energia positiva, mostramos que a condição de que a pressão termodinâmica deve ser negativa também é respeitada neste estudo. Algumas primeiras conjecturas para o valor da massa de repouso do "axion" produzem uma estimativa de 1,44x1052 ± 4Gev4 para a densidade de energia escura. Dessa forma, esperamos ter tido razões boas o suficiente para revisitar a teoria de Casimir para a energia escura, proposta em 2002 por M. Turner.
We assume that Dark Energy" (of a fixed small region of space at the present cosmic time) may be identified with the system consisting of the vacuum and of a few one-particle states of zero momentum of a scalar quantum field of mass u different 0. Under this assumption we show that local quantum field theory yields a corresponding energy momentum tensor of the perfect fuid form, and that a strictly positive energy can be localized only in regions of linear dimension L of the order of the particle Compton wave-length 1/u. Some early conjectured values for the \axion" rest-mass yield an estimate 1:44x10-56+4GeV4 for the dark energy density. In this way, we hope to have "made a case" for revisiting the Casimir theory of dark energy, proposed in 2002 by M. Turner.
Advisors/Committee Members: Maria Carolina Nemes, Walter F. Wreszinski, Maria Carolina Nemes, Ricardo Schwartz Schor, Ronald Dickman, Domingos Savio de Lima Soares.
Subjects/Keywords: Fisica Teses; Energia escura; Dark energy; Teoria de Casimir
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APA (6th Edition):
Lima, G. G. d. (2009). Teoria de Casimir para a energia escura revisitada. (Thesis). Universidade Federal de Minas Gerais. Retrieved from http://hdl.handle.net/1843/ESCZ-7YSJH2
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):
Lima, Gustavo Gazzola de. “Teoria de Casimir para a energia escura revisitada.” 2009. Thesis, Universidade Federal de Minas Gerais. Accessed March 07, 2021.
http://hdl.handle.net/1843/ESCZ-7YSJH2.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lima, Gustavo Gazzola de. “Teoria de Casimir para a energia escura revisitada.” 2009. Web. 07 Mar 2021.
Vancouver:
Lima GGd. Teoria de Casimir para a energia escura revisitada. [Internet] [Thesis]. Universidade Federal de Minas Gerais; 2009. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1843/ESCZ-7YSJH2.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lima GGd. Teoria de Casimir para a energia escura revisitada. [Thesis]. Universidade Federal de Minas Gerais; 2009. Available from: http://hdl.handle.net/1843/ESCZ-7YSJH2
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Riverside
25.
Xu, Jun.
Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches.
Degree: Physics, 2017, University of California – Riverside
URL: http://www.escholarship.org/uc/item/170303p7
► The Casimir effect was first predicted by Hendrik Casimir in 1948. It was described as an attractive force between two neutral, parallel conducting plates placing…
(more)
▼ The Casimir effect was first predicted by Hendrik Casimir in 1948. It was described as an attractive force between two neutral, parallel conducting plates placing in a vacuum. It is explained by the quantum field theory using the zero-point oscillations of quantized electromagnetic fields with the presence of boundaries. As a macroscopic phenomenon arises from the zero-point energy, it plays an important role in both fundamental physics and, micro- and nano-technology. The development of precision Casimir force measurements since 1997 allows a quantitative comparison between experiment and theory. Specifically, the comparison results help us to investigate the thermal Casimir effect and set constraints on the hypothetical non-Newtonian gravity.In this work, we study the residual force induced by electrostatic patches in precision Casimir force measurements. We find that the residual force can be eliminated even prior to Ar ion cleaning. Compensation could be achieved only if the residual potential for the two grounded surfaces did not vary with distance within the experimental error. This however happens for a small fraction of the measurements. For most surfaces the residual potential changed as a function of distance due to the electrostatic patches. The optimal Ar ion cleaning was found to be 500 V beam voltage, 80% focus voltage, 10 uA anode current, 2x10-5 torr Argon pressure and 15 cm gun-sample separation. After 100 minutes Ar ion cleaning the residual potential decreased to 1.3 +/- 1.2 mV. For cleaned surfaces the residual potential did not change as a function of distance allowing compensation of the electrostatic force. The Casimir force for cleaned surfaces matches the Lifshitz theory for Au where the energy loss from free electron scattering with zero point photons in the metal has been neglected.
Subjects/Keywords: Physics; AFM; Argon ion gun; Casimir; Electrostatic Patches
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APA (6th Edition):
Xu, J. (2017). Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/170303p7
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):
Xu, Jun. “Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches.” 2017. Thesis, University of California – Riverside. Accessed March 07, 2021.
http://www.escholarship.org/uc/item/170303p7.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Xu, Jun. “Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches.” 2017. Web. 07 Mar 2021.
Vancouver:
Xu J. Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches. [Internet] [Thesis]. University of California – Riverside; 2017. [cited 2021 Mar 07].
Available from: http://www.escholarship.org/uc/item/170303p7.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Xu J. Precision Casimir Force Measurements After In Situ Argon-Ion Beam Bombardment: Studying the Role of Electrostatic Patches. [Thesis]. University of California – Riverside; 2017. Available from: http://www.escholarship.org/uc/item/170303p7
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
UCLA
26.
Kachan, Devin.
Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks.
Degree: Physics, 2014, UCLA
URL: http://www.escholarship.org/uc/item/6v400993
► Fluctuation-induced interactions are an important organizing principle in a variety of soft matter systems. In this dissertation, I explore the role of both thermal and…
(more)
▼ Fluctuation-induced interactions are an important organizing principle in a variety of soft matter systems. In this dissertation, I explore the role of both thermal and active fluctuations within cross-linked polymer networks. The systems I study are in large part inspired by the amazing physics found within the cytoskeleton of eukaryotic cells. I first predict and verify the existence of a thermal Casimir force between cross-linkers bound to a semi-flexible polymer. The calculation is complicated by the appearance of second order derivatives in the bending Hamiltonian for such polymers, which requires a careful evaluation of the the path integral formulation of the partition function in order to arrive at the physically correct continuum limit and properly address ultraviolet divergences. I find that cross linkers interact along a filament with an attractive logarithmic potential proportional to thermal energy. The proportionality constant depends on whether and how the cross linkers constrain the relative angle between the two filaments to which they are bound.The interaction has important implications for the synthesis of biopolymer bundles within cells. I model the cross-linkers as existing in two phases: bound to the bundle and free in solution. When the cross-linkers are bound, they behave as a one-dimensional gas of particles interacting with the Casimir force, while the free phase is a simple ideal gas. Demanding equilibrium between the two phases, I find a discontinuous transition between a sparsely and a densely bound bundle. This discontinuous condensation transition induced by the long-ranged nature of the Casimir interaction allows for a similarly abrupt structural transition in semiflexible filament networks between a low cross linker density isotropic phase and a higher cross link density bundle network. This work is supported by the results of finite element Brownian dynamics simulations of semiflexible filaments and transient cross-linkers. I speculate that cells take advantage of this equilibrium effect by tuning near the transition point, where small changes in free cross-linker density will affect large structural rearrangements between free filament networks and networks of bundles. Cells are naturally found far from equilibrium, where the active influx of energy from ATP consumption controls the dynamics. Motor proteins actively generate forces within biopolymer networks, and one may ask how these differ from the random stresses characteristic of equilibrium fluctuations. Besides the trivial observation that the magnitude is independent of temperature, I find that the processive nature of the motors creates a temporally correlated, or colored, noise spectrum. I model the network with a nonlinear scalar elastic theory in the presence of active driving, and study the long distance and large scale properties of the system with renormalization group techniques. I find that there is a new critical point associated with diverging correlation time, and that the colored noise produces novel…
Subjects/Keywords: Physics; biophysics; casimir; condensed matter; nonequilibrium physics; polymers
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APA (6th Edition):
Kachan, D. (2014). Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/6v400993
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):
Kachan, Devin. “Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks.” 2014. Thesis, UCLA. Accessed March 07, 2021.
http://www.escholarship.org/uc/item/6v400993.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kachan, Devin. “Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks.” 2014. Web. 07 Mar 2021.
Vancouver:
Kachan D. Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks. [Internet] [Thesis]. UCLA; 2014. [cited 2021 Mar 07].
Available from: http://www.escholarship.org/uc/item/6v400993.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kachan D. Equilibrium & Nonequilibrium Fluctuation Effects in Biopolymer Networks. [Thesis]. UCLA; 2014. Available from: http://www.escholarship.org/uc/item/6v400993
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Merced
27.
Inan, Nader.
Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors).
Degree: Physics, 2018, University of California – Merced
URL: http://www.escholarship.org/uc/item/3kt7z6kw
► The linearization of General Relativity leads to various formulations of gravity often referred to as gravito-electromagnetism due to its resemblance to electromagnetism. Three methods are…
(more)
▼ The linearization of General Relativity leads to various formulations of gravity often referred to as gravito-electromagnetism due to its resemblance to electromagnetism. Three methods are compared: (i) the harmonic gauge approach; (ii) the Parameterized Post-Newtonian (PPN) approach; and (iii) the Helmholtz Decomposition (HD) approach. New relationships are developed that are not generally found in the literature. These include the use of the linearized Bianchi identity, the Landau-Lifshitz pseudotensor, the Isaacson power formula, the geodesic equation of motion, and the geodesic deviation equation. The formalism is applied to examples such as a mass-solenoid and a gravitational mutual inductance system. The HD approach is shown to be the most favorable of the three methods due to being gauge-invariant (to linear order in the metric), and because it shows explicitly that the transverse-traceless part of the metric contains the only radiative degrees of freedom. This is similar to the transverse-traceless (TT) gauge except that the HD formulation is fully valid in matter. Therefore, unlike the TT gauge, the HD formulation can be used to describe how gravitational waves interact with various types of material. Traditionally, it is believed that all known materials are essentially transparent to gravitational waves. However, this conclusion relies on a classical treatment which describes how gravitational waves (originating from astrophysical sources) are passively detected with no affect on the wave itself. As an alternative, we consider how gravitational waves could be coupled to quantum systems which may be used for detection as well as reflection and even generation of gravitational waves. To investigate this possibility, a classical Hamiltonians is developed which describes the kinematics of charged, relativistic, massive particles in curved space-time. The coupling of quantum matter to gravitational fields is then described by quantizing the Hamiltonian. This leads to various gravitational quantum effects such gravitational Aharonov-Bohm effects, gravitational Casimir effects, and various time-holonomies. Furthermore, developing a quantized stress tensor and taking the expectation value allows the Einstein field equation to predict how quantum matter can produce classical gravitational fields. This semi-classical approach is used to describe how superconductors interact with gravitational waves. A London-like constitutive equation describes the response of the superconductor in terms of a "gravitational shear modulus" analogous to the standard shear modulus of elastic mechanics. Also using a "gravitational permeativity" (analogous to the magnetic permeability) leads to a gravitational plasma frequency, index of refraction, penetration depth, and impedance. The same analysis also done for a normal conductor using a gravitational Ohm-like constitutive equation, however, it is shown that a superconductor exhibits a gravitational Meissner-like effect, while a normal conductor does not. For the case of a…
Subjects/Keywords: Physics; Casimir; General Relativity; Ginzburg-Landau; Gravitational waves; Gravity; Superconductivity
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APA ·
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APA (6th Edition):
Inan, N. (2018). Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors). (Thesis). University of California – Merced. Retrieved from http://www.escholarship.org/uc/item/3kt7z6kw
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):
Inan, Nader. “Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors).” 2018. Thesis, University of California – Merced. Accessed March 07, 2021.
http://www.escholarship.org/uc/item/3kt7z6kw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Inan, Nader. “Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors).” 2018. Web. 07 Mar 2021.
Vancouver:
Inan N. Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors). [Internet] [Thesis]. University of California – Merced; 2018. [cited 2021 Mar 07].
Available from: http://www.escholarship.org/uc/item/3kt7z6kw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Inan N. Formulations of General Relativity and their Applications to Quantum Mechanical Systems (with an emphasis on gravitational waves interacting with superconductors). [Thesis]. University of California – Merced; 2018. Available from: http://www.escholarship.org/uc/item/3kt7z6kw
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Lucas Chibebe Céleri.
O efeito Casimir dinâmico e decoerência.
Degree: 2008, Universidade Federal de São Carlos
URL: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=2173
► Demonstramos nesta tese, primeiramente, que a ação inevitável do meio ambiente pode ser substancialmente enfraquecida quando consideramos sistemas quânticos não estacionários apropriados. Diferentemente do programa…
(more)
▼ Demonstramos nesta tese, primeiramente, que a ação inevitável do meio ambiente pode ser substancialmente enfraquecida quando consideramos sistemas quânticos não estacionários apropriados. Diferentemente do programa de engenharia de reservatórios e de forma similar aos protocolos para o desacoplamento dinâmico de sistemas quânticos abertos, nossa proposta não requer o conhecimento prévio do estado a ser protegido. Diferentemente mesmo dos esquemas de desacoplamento dinâmico, a proteção de estados de modos não estacionários prescinde da disponibilidade de pulsos externos ultra rápidos que atuem sobre o sistema de interesse em intervalos de tempo mais curtos que a menor escala de tempo acessível aos graus de liberdade do reservatório. No domínio da engenharia de estados em eletrodinâmica quântica de cavidades, mostramos como preparar modos não estacionários através da interação dispersiva do campo com átomos de dois níveis submetidos `a amplificação linear. Tratamos, em seguida, de diferentes aspectos do efeito
Casimir dinâmico (ECD) através da derivação de hamiltonianos efetivos capazes de descrever convenientemente os principais aspectos do fenomeno. Começamos pelo ECD não ideal a temperaturas finitas. Obtivemos expressões gerais tanto para número médio de partículas criadas como para a entropia linear de um estado arbitrário preparado em um modo selecionado da cavidade, expressões estas que se aplicam a qualquer lei de movimento da fronteira móvel. Desenvolvemos, através destas expressões, uma análise abrangente das ressonâncias presentes tanto na criação de partículas como na perda de pureza e decoerência de estados. Consideramos também o ECD no contexto de um campo escalar não massivo confinado, sob as condições de contorno de Dirichlet, entre duas cascas esféricas concêntricas. Utilizamos dois diferentes métodos, o operador densidade e os coeficientes de Bogoliubov, para o cálculo da expressão geral para o número médio de partículas criadas, válida para qualquer lei de movimento das cascas esféricas. Aplicamos esta expressão para o cálculo do número de partículas produzidas quando apenas uma das cascas oscila ou quando ambas oscilam em fase ou fora de fase, e v comparamos os resultados com aqueles associados `a geometria plana. Por fim, analisamos a ação do campo gravitacional sobre o ECD. Para tal, consideramos um campo escalar não massivo confinado numa cavidade cubóide localizada em um campo gravitacional descrito por uma métrica estática e diagonal. Assumindo que uma das paredes planas da cavidade seja móvel, obtivemos o número de partículas criadas no interior da cavidade através do cálculo, via expansões perturbativas, dos coeficientes de Bogoliubov. Aplicamos o resultado para o caso particular de um movimento oscilatório da fronteira móvel, considerando um campo gravitacional fraco descrito pela métrica de Schwarzschild. O regime de amplificação paramétrica é detalhadamente analisado, demonstrando que nosso resultado para o número médio de partículas criadas, está em acordo com resultados particulares…
Advisors/Committee Members: Miled Hassan Youssef Moussa.
Subjects/Keywords: Sistemas não estacionários; Efeito Casimir dinâmico; Decoerência (Decoherence); Gravitação; FISICA
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APA (6th Edition):
Céleri, L. C. (2008). O efeito Casimir dinâmico e decoerência. (Thesis). Universidade Federal de São Carlos. Retrieved from http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=2173
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):
Céleri, Lucas Chibebe. “O efeito Casimir dinâmico e decoerência.” 2008. Thesis, Universidade Federal de São Carlos. Accessed March 07, 2021.
http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=2173.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Céleri, Lucas Chibebe. “O efeito Casimir dinâmico e decoerência.” 2008. Web. 07 Mar 2021.
Vancouver:
Céleri LC. O efeito Casimir dinâmico e decoerência. [Internet] [Thesis]. Universidade Federal de São Carlos; 2008. [cited 2021 Mar 07].
Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=2173.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Céleri LC. O efeito Casimir dinâmico e decoerência. [Thesis]. Universidade Federal de São Carlos; 2008. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=2173
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Harvard University
29.
Woolf, David Nathaniel.
Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect.
Degree: PhD, Engineering and Applied Sciences, 2013, Harvard University
URL: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158247
► The coupling of macroscopic objects via the optical near-field can generate strong attractive and repulsive forces. Here, I explore the static and dynamic optomechanical interactions…
(more)
▼ The coupling of macroscopic objects via the optical near-field can generate strong attractive and repulsive forces. Here, I explore the static and dynamic optomechanical interactions that take place in a geometry consisting of a silicon nanomembrane patterned with a square-lattice photonic crystal suspended above a silicon-on-insulator substrate. This geometry supports a hybridized optical mode formed by the coupling of eigenmodes of the membrane and the silicon substrate layer. This system is capable of generating nanometer-scale deflections at low optical powers for membrane-substrate gaps of less than 200 nm due to the presence of an optical cavity created by the photonic crystal that enhances both the optical force and a force that arises from photo-thermal-mechanical properties of the system. Feedback between Brownian motion of the membrane and the optical and photo-thermal forces lead to dynamic interactions that perturb the mechanical frequency and linewidth in a process known as ``back-action.'' The static and dynamic properties of this system are responsible for optical bistability, mechanical cooling and regenerative oscillations under different initial conditions. Furthermore, solid objects separated by a small distance experience the Casimir force, which results from quantum fluctuations of the electromagnetic field (i.e. virtual photons).The Casimir force supplies a strong nonlinear perturbation to membrane motion when the membrane-substrate separation is less than 150 nm. Taken together, the unique properties of this system makes it an intriguing candidate for transduction, accelerometry, and sensing applications.
Engineering and Applied Sciences
Advisors/Committee Members: Capasso, Federico (advisor), Capasso, Federico (committee member), Crozier, Ken (committee member), Vlassak, Joost (committee member), Westervelt, Bob (committee member).
Subjects/Keywords: Physics; Optics; Casimir; Forces; MEMS; Optomechanics; Photonics; Plasmonics
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APA ·
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APA (6th Edition):
Woolf, D. N. (2013). Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect. (Doctoral Dissertation). Harvard University. Retrieved from http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158247
Chicago Manual of Style (16th Edition):
Woolf, David Nathaniel. “Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect.” 2013. Doctoral Dissertation, Harvard University. Accessed March 07, 2021.
http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158247.
MLA Handbook (7th Edition):
Woolf, David Nathaniel. “Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect.” 2013. Web. 07 Mar 2021.
Vancouver:
Woolf DN. Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect. [Internet] [Doctoral dissertation]. Harvard University; 2013. [cited 2021 Mar 07].
Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158247.
Council of Science Editors:
Woolf DN. Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect. [Doctoral Dissertation]. Harvard University; 2013. Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158247
30.
江本, 伸悟.
非線形変調するアルフベン波の可積分性と構造の解析.
Degree: 修士(科学), 2017, The University of Tokyo / 東京大学
URL: http://hdl.handle.net/2261/48832
プラズマは, 例えば太陽コロナに見られる構造のように, 流れを持つ構造を自己組織化し得る. ハミルトン力学系の観点からプラズマが形成し得る秩序構造(可積分構造)を考察するとき, その構造は系が持つ保存量によって特徴付けられる. 生成作用素の位相欠陥に由来する保存量:カシミール元によって特徴付けられる秩序構造:Beltrami平衡は, 流れを持つ非自明な構造を取ることができる. また, Beltrami平衡解をガリレイ変換することによって, 定常進行波解を構成できることが知られている. このように, Beltrami平衡解を基にして解を構成していくことによって, プラズマの秩序構造をどこまでカバーすることができるのかということが本論文の関心事である. 特に, このような構造に摂動が加わったときの可積分性の揺らぎ, 即ち, 全ての秩序が失われ構造が崩れてしまうのか, それとも何らかの秩序を保持した新たな秩序状態が出現するのかに着目している. 本論文では, Beltrami平衡から生じる秩序構造:アルフベン波に圧縮性(摂動)が加わったときの変調構造に関して, Hall MHD方程式を用いた解析が為される. その結果, 定常進行する変調波は秩序的な波形を持つことを示される. また, 具体的な波形として, 全域に渡って周期的な変調している波形, 或る一箇所でのみ局所的に変調している波形, 更に, 無変調領域と局所変調領域とが不規則に組み合わさった波形が示される. アルフベン波解の周辺に広がる可積分構造についての解析が進められた.
Subjects/Keywords: Alfvén wave; Hall MHD; Casimir; Hamiltonian system; Integrable system
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APA (6th Edition):
江本, . (2017). 非線形変調するアルフベン波の可積分性と構造の解析. (Thesis). The University of Tokyo / 東京大学. Retrieved from http://hdl.handle.net/2261/48832
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):
江本, 伸悟. “非線形変調するアルフベン波の可積分性と構造の解析.” 2017. Thesis, The University of Tokyo / 東京大学. Accessed March 07, 2021.
http://hdl.handle.net/2261/48832.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
江本, 伸悟. “非線形変調するアルフベン波の可積分性と構造の解析.” 2017. Web. 07 Mar 2021.
Vancouver:
江本 . 非線形変調するアルフベン波の可積分性と構造の解析. [Internet] [Thesis]. The University of Tokyo / 東京大学; 2017. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/2261/48832.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
江本 . 非線形変調するアルフベン波の可積分性と構造の解析. [Thesis]. The University of Tokyo / 東京大学; 2017. Available from: http://hdl.handle.net/2261/48832
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations