Staggered-ladder quasienergy spectra for generic quasimomentum and quantum-dynamical manifestations

Itzhack Dana

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3 Scopus citations


A non-Poisson regular quasienergy spectrum is found for the generalized kicked particle under quantum-resonance conditions at generic quasimomentum, a quantity most relevant in atom-optics experimental realizations of kicked-rotor systems. The regular spectrum has the structure of a staggered ladder, i.e., it is the superposition of a finite number of ladder subspectra all having the same spacing, which is independent of the nonintegrability of the system. This spectral structure is shown to have distinct quantum-dynamical manifestations: a suppression of quantum resonances and a dynamical localization characterized by unique features such as traveling-wave components in the time evolution. These phenomena are found to be robust under small variations of the quasimomentum and should therefore be experimentally observable using Bose-Einstein condensates with sufficiently small quasimomentum width.

Original languageEnglish
Article number043623
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
StatePublished - 17 Apr 2013


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