Abstract
We analyze the classical phase space of the hydrogen atom in crossed magnetic and circularly polarized microwave fields in the high-frequency regime, using the Chirikov resonance overlap criterion and the renormalization map. These methods are used to compute thresholds to large-scale chaos and to ionization. The effect of the magnetic field is a strong stabilization of a set of invariant tori that bound the trajectories and prevent stochastic ionization. In order to ionize, larger amplitudes of the microwave field are necessary in the presence of a magnetic field.
- Received 14 January 2002
DOI:https://doi.org/10.1103/PhysRevA.65.053402
©2002 American Physical Society