Abstract
Localization and manipulation of Rydberg wave packets using half cycle pulses are discussed. Rydberg wave packets can be localized by applying a train of half-cycle pulses equispaced in time. The localization in this “kicked” Rydberg atom can be due to trapping the wave packet inside the stable islands seen in the classical mixed phase space structure, or the scarred wave function representing quantum mechanical localization while the classical atoms show fast ionization. Chirping the frequency of a train of pulses and modulating the kick strength modify the phase space structure in time and the localized wave packet can be driven to the preferred location in phase space by properly adjusting the time evolution of the phase space structure.
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