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Atomes de Rydberg en champ micro-onde : régularité et chaos

Abstract : We develop a theoretical formalism which provides a powerful tool for the detailed numerical analysis of the interaction of three-dimensional hydrogen atoms with an intense radiation field. The application of this approach to the microwave ionization of Rydberg states of hydrogen provides the most realistic numerical experiments in this area up to date. A profound analysis of ionization signals and thresholds, of level dynamics and the phase space projections of associated wavefunctions is provided for a one-dimensional model of the atom. Comparison to the ionization of three-dimensional atoms confirms the validity of the one-dimensional model for extended initial states and, hence, dynamical localization theory, as far as the ionization threshold is concerned. Three classes of three-dimensional initial states with distinct symmetries are identified and shown to be more or less adapted to the symmetries of the eigenstates of the microwave problem. "Scarred" wavefunctions of the three-dimensional hydrogen atom exposed to microwave field are shown. Finally, the dynamics of a circular state in a microwave and in an intense laser field are compared.
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  • HAL Id : tel-00011885, version 1

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Andreas Buchleitner. Atomes de Rydberg en champ micro-onde : régularité et chaos. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 1993. Français. ⟨tel-00011885⟩

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