CHAOS IN THE HYDROGEN-ATOM INTERACTING WITH EXTERNAL FIELDS

In this review we discuss the chaotic dynamics (both classical and qua ntal aspects) of a simple atomic system, namely hydrogen atom interact ing with time independent and time dependent external fields. These in clude: i) static electric field, ii) static magnetic field, iii) combi ned electric and magnetic fields, in parallel and perpendicular config uration, iv) instantaneous and generalized van der Waals field, v) mas s anisotropy and vi) linearly and circularly polarized microwave field s.