Interactions destroy dynamical localization with strong and weak chaos
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Date
2011-11-01
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Publisher
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
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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 t1/2. In the asymptotic weak-chaos case the growth crosses over into a t1/3 law. The results do not depend on the details of the kicking. © Europhysics Letters Association.
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Keywords
Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, PHYSICS, MULTIDISCIPLINARY, QUANTUM CHAOS, SYSTEMS, ATOMS
Citation
EPL, 2011, 96 (3), pp. ? - ? (6)