Transient localization in the kicked Rydberg atom
E. Persson, S. Fürthauer, S. Wimberger, J. Burgdörfer
Abstract
We investigate the long-time limit of quantum localization of the kicked Rydberg atom. The kicked Rydberg atom is shown to possess in addition to the quantum localization time τL a second cross-over time tD where quantum dynamics diverges from classical dynamics towards increased instability. The quantum localization is shown to vanish as either the strength of the kicks at fixed principal quantum number or the quantum number at fixed kick strength increases. The survival probability as a function of frequency in the transient localization regime τL<t<tD is characterized by highly irregular, fractal-like fluctuations.
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