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Interactions destroy dynamical localization with strong and weak chaos

MPS-Authors
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Gligoric,  G.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Bodyfelt,  J. D.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Flach,  S.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Gligoric, G., Bodyfelt, J. D., & Flach, S. (2011). Interactions destroy dynamical localization with strong and weak chaos. EPL, 96(3): 30004.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8BD5-1
Abstract
Bose-Einstein condensates loaded into kicked optical lattices can be treated as quantum kicked-rotor systems. Noninteracting rotors show dynamical localization in momentum space. The experimentally tunable condensate interaction is included in a qualitative Gross-Pitaevskii-type model based on two-body interactions. We observe strong- and weak-chaos regimes of wave packet spreading in momentum space. In the intermediate strong-chaos regime the condensate energy grows as t(1/2). In the asymptotic weak-chaos case the growth crosses over into a t(1/3) law. The results do not depend on the details of the kicking. Copyright (C) EPLA, 2011