Loss of superfluidity in a Bose-Einstein condensate on an optical lattice via a novel classical phase transition

被引：19

作者：

Adhikari, SK ^{[1
]}

机构：

[1] Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil

来源：

PHYSICS LETTERS A | 2003年 / 308卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

Bose-Einstein condensation; superfluid-insulator transition;

D O I：

10.1016/S0375-9601(03)00059-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We predict the loss of superfluidity in a Bose-Einstein condensate (BEC) trapped in a combined optical and axially-symmetric harmonic potentials during a resonant collective excitation initiated by a periodic modulation of the atomic scattering length a, when the modulation frequency equals twice the radial trapping frequency or multiples thereof. This classical dynamical transition is marked by a loss of superfluidity in the BEC and a subsequent destruction of the interference pattern upon free expansion. Suggestion for future experiment is made. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：302 / 307

页数：6

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