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Title Experimental Study of Potassium and Strontium Rydberg Atoms - Chaotic Ionization, Quantum Optical Phenomena and Multiphoton Excitation
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Publication Date
Date Accessioned
Degree PhD
Discipline/Department Natural Sciences
Degree Level doctoral
University/Publisher Rice University
Abstract Very-high-n (n~300) Rydberg atoms serve as a powerful tool to study chaos and quantum optical phenomena. Measurements using a series of alternating impulsive kicks applied to potassium Rydberg atoms reveal that a phase space geometric structure called the turnstile governs the ionization process. Studies of the excitation spectra for potassium Rydberg atoms in a strong sinusoidal electric drive field in the radio frequency (100-300 MHz) regime, display quantum optical phenomena including electromagnetically induced transparency and Aulter-Townes splitting, and the data are well explained within the framework of Floquet theory. In order to study the strong dipole-dipole interactions between neutral atoms, new experimental techniques have been developed to create high densities of very-high-n (n~300-500) strontium Rydberg atoms using two- and three-photon excitation. The data demonstrate that high densities of strongly-polarized quasi-one-dimensional states can be produced and form the basis for further manipulation of the atomic wave functions. The strontium Rydberg states are modeled using a two-active-electron theory which produces results in good agreement with experimental observations.
Subjects/Keywords Rydberg atoms; Strontium; Potassium; Chaotic ionization; Quantum optical phenomena; Multiphoton excitation
Contributors Dunning, F. Barry (committee member); Killian, Thomas C. (committee member); Brooks, Philip R. (committee member)
Language en
Country of Publication us
Record ID handle:1911/77588
Repository rice
Date Retrieved
Date Indexed 2018-12-06
Grantor Rice University
Issued Date 2014-04-24 00:00:00

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…viii 3.4 3.5 3.6 3.7 4.1 4.2 4.3 4.4 4.5 4.6 4.7 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 Experimentally measured ionization fractions . . . . . . . . . . . . . . E−1 lobe characteristics in energy-time coordinates for T = 3 ns…

…E−1 lobe characteristics in energy-time coordinates for T = 11 ns . . Ionization fraction as a function of kick strength ∆˜ p for different values of T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 40 41 Excitation…

…the energy surface . Ionization behavior of low-l (li ∼ 0) Rydberg states subject to a field step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measured and calculated ionization probabilities as a function of probe…

Ionization probabilities for “nP ”, “nD”, and other states in the spectrum as a function of Fstep . . . . . . . . . . . . . . . . . . . . . . . . Oscillations of survival probabilities probed from near-circular Bohrlike wave packets…

…2 (1.2) where pi is the initial momentum of the excited electron. 1.1 1.1.1 Motivations Chaotic Ionization Complex chaotic behavior exists in many physical systems that range from the large scale such as global weather patterns [3…

…strength to enhance our understanding of the turnstile mechanism in atomic ionization. 1.1.2 Nonlinear Optical Phenomena We have also studied very-high-n Rydberg atoms excited in the presence of sinusoidal radio-frequency (rf) drive fields. In…

…4 Figure 1.1: Results of the chaotic ionization research from earlier work. A series of HCPs as shown in (a) is applied to high-n quasi-1D Rydberg atoms. The figure on the top right shows the resulting survival probabilities as a function…

…distribution and the escape lobe [6]. 5 Figure 1.2: Results from earlier work of the effect of application of an rf drive field whose frequency is slowly varied. The bottom left figure shows selective field ionization spectra showing the changes in…

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