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Pinquan Qin
복잡계 이론물리 연구단
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Interacting ultracold atomic kicked rotors: Loss of dynamical localization

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Title
Interacting ultracold atomic kicked rotors: Loss of dynamical localization
Author(s)
Pinquan Qin; Alexei Andreanov; Hee Chul Park; Sergej Flach
Publication Date
2017-01
Journal
SCIENTIFIC REPORTS, v.7, no.41139, pp.2045 - 2322
Publisher
NATURE PUBLISHING GROUP
Abstract
We study the fate of dynamical localization of two quantum kicked rotors with contact interaction, which relates to experimental realizations of the rotors with ultra-cold atomic gases. A single kicked rotor is known to exhibit dynamical localization, which takes place in momentum space. The contact interaction affects the evolution of the relative momentum k of a pair of interacting rotors in a non-analytic way. Consequently the evolution operator U is exciting large relative momenta with amplitudes which decay only as a power law 1/k 4. This is in contrast to the center-of-mass momentum K for which the amplitudes excited by U decay superexponentially fast with K. Therefore dynamical localization is preserved for the center-of-mass momentum, but destroyed for the relative momentum for any nonzero strength of interaction. © The Author(s) 2017
URI
http://pr.ibs.re.kr/handle/8788114/3775
DOI
10.1038/srep41139
ISSN
2045-2322
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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