Phys. Rev. A 67, 033408 (2003) [7 pages]Resonances for Rydberg atoms in a precessing electric field of constant amplitudeReceived 1 October 2002; published 26 March 2003 The quasienergy spectrum of hydrogenlike Rydberg atoms in a precessing electric field of constant amplitude is found in simple form. Resonant intrashell transitions occur for specific field values when a (small) additional static electric field perpendicular to the precession axis is present. Sequences of such transitions may enhance the microwave ionization of a Rydberg atom. C. H. Cheng and T. F. Gallagher [Phys. Rev. A 61, 063411 (2000)] recently observed a one-photon resonance of this type. We evaluate the widths of one-photon intrashell resonances, and develop a general approach to the N-photon case within the framework of a quasienergy representation. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.033408
DOI:
10.1103/PhysRevA.67.033408
PACS:
32.80.Rm, 32.60.+i
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