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복잡계 이론물리 연구단
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Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice

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Title
Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
Author(s)
Raka Dasgupta; B. Prasanna Venkatesh; Gentaro Watanabe
Publication Date
2016-06
Journal
PHYSICAL REVIEW A, v.93, no.6, pp.063618 -
Publisher
AMER PHYSICAL SOC
Abstract
We study multiple-period Bloch states of a Bose-Einstein condensate with spatially periodic interatomic interaction. Solving the Gross-Pitaevskii equation for the continuum model, and also using a simplified discrete version of it, we investigate the energy-band structures and the corresponding stability properties. We observe an “attraction-induced dynamical stability” mechanism caused by the localization of the density distribution in the attractive domains of the system and the isolation of these higher-density regions. This makes the superfluid stable near the zone boundary and also enhances the stability of higher-periodic states if the nonlinear interaction strength is sufficiently high. ©2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2651
DOI
10.1103/PhysRevA.93.063618
ISSN
2469-9926
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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