Radiative decay of nondispersive wave packets
Max-Planck-Institut für Quantenoptik,
Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
2 The Queen's University of Belfast - Belfast BT7 1NN, Northern Ireland
Accepted: 11 December 1997
We study the decay of nondispersive electronic wave packets in strongly driven hydrogen atoms, which are coupled to the atomic continuum and to the vacuum modes of the electromagnetic field. A novel implementation of complex scaling allows to derive a master equation that incorporates the interplay of the coherent and the incoherent decay process. Ample numerical data predict a crossover from ionization via chaos-assisted tunneling to radiative decay, at experimentally accessible Rydberg levels.
PACS: 32.80.Rm – Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) / 05.45.+b – Theory and models of chaotic systems / 05.30.-d – Quantum statistical mechanics
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