Superfluidity versus Anderson localization in a dilute Bose gas

[en] We consider the motion of a quasi-one-dimensional beam of Bose-Einstein condensed particles in a disordered region of finite extent. Interaction effects lead to the appearance of two distinct regions of stationary flow. One is subsonic and corresponds to superfluid motion. The other one is supersonic and dissipative and shows Anderson localization. We compute analytically the interaction-dependent localization length. We also explain the disappearance of the supersonic stationary flow for large disordered samples.

Disciplines :

Physics

Author, co-author :

Paul, T.

Schlagheck, Peter ; Université de Liège - ULiège > Département de physique > Physique quantique statistique

Leboeuf, P.

Pavloff, N.

Language :

English

Title :

Superfluidity versus Anderson localization in a dilute Bose gas

Publication date :

2007

Journal title :

Physical Review Letters

ISSN :

0031-9007

eISSN :

1079-7114

Publisher :

American Physical Society, Ridge, United States - New York

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 05 November 2010

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