Abstract
We study the spectral properties of three-dimensional Rydberg states of atomic hydrogen in a microwave field of linear polarization. We identify a novel structure in the Floquet spectrum as the ``backbone'' of the experimentally observed ionization process. Localization properties, energies, and lifetimes of the individual Floquet states are shown to faithfully reflect the structure of classical phase space, which can be described by a perturbative approach.
- Received 12 April 1996
DOI:https://doi.org/10.1103/PhysRevA.55.R1585
©1997 American Physical Society
