Two-dimensional quantum hydrogen atom in circularly polarized microwaves: Global properties

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.54.691· OSTI ID:285945

Zakrzewski, J; Gebarowski, R; Delande, D ^[1]

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1. Instytut Fizyki Mariana Smoluchowskiego, Uniwersytet Jagiellonski, ulica Reymonta 4, 30-059 Krakow (Poland)

The ionization of hydrogen Rydberg atoms by {ital circularly} polarized microwaves is studied quantum mechanically in a model two-dimensional atom. We apply a combination of a transformation to the coordinate frame rotating with the field, with complex rotation approach and representation of the atomic subspace in a Sturmian-type basis. The diagonalization of resulting matrices allows us to treat exactly the ionization of atoms initially prepared in highly excited Rydberg states of principal quantum number {ital n}{sub 0}{approx_equal}60. Similarities and differences between ionization by circularly and linearly polarized microwaves are discussed with a particular emphasis on the high-frequency regime and on the localization phenomenon. The dependence of the ionization character on the initial state (circular, elliptical, or low angular momentum state) as well as on the helicity of the polarization is discussed in detail. It is shown that, in the high-frequency chaotic regime, close encounters with the nucleus do {ital not} play a major role in the ionization process. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 285945
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CIRCULAR POLARIZATION
HYDROGEN
LINEAR POLARIZATION
MATRIX ELEMENTS
MICROWAVE RADIATION
MULTI-PHOTON PROCESSES
PHOTOIONIZATION
POLARIZATION
QUANTUM MECHANICS
RYDBERG STATES
TWO-DIMENSIONAL CALCULATIONS
TWO-LEVEL SYSTEMS