Phase coherence and superfluid-insulator transition in a disordered Bose-Einstein condensate

被引：106

作者：

Chen, Yong P. ^{[1
,2
,3
]}

Hitchcock, J. ^{[1
,2
]}

Dries, D. ^{[1
,2
]}

Junker, M. ^{[1
,2
]}

Welford, C. ^{[1
,2
]}

Hulet, R. G. ^{[1
,2
]}

机构：

[1] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA

[2] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

[3] Rice Univ, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.77.033632

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have studied the effects of a disordered optical potential on the transport and phase coherence of a Bose-Einstein condensate (BEC) of Li-7 atoms. At moderate disorder strengths (V-D), we observe inhibited transport and damping of dipole excitations, while in time-of-flight images, random but reproducible interference patterns are observed. In situ images reveal that the appearance of interference is correlated with density modulation, without complete fragmentation. At higher V-D, the interference contrast diminishes as the BEC fragments into multiple pieces with little phase coherence.

引用

页数：4

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