Coherent backscattering of Bose-Einstein condensates in two-dimensional disorder potentials

被引：42

作者：

Hartung, Michael ^{[1
]}

Wellens, Thomas ^{[2
]}

Mueller, Cord A. ^{[3
]}

Richter, Klaus ^{[1
]}

Schlagheck, Peter ^{[1
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[2] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

[3] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.101.020603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study quantum transport of an interacting Bose-Einstein condensate in a two-dimensional disorder potential. In the limit of a vanishing atom-atom interaction, a sharp cone in the angle-resolved density of the scattered matter wave is observed, arising from constructive interference between amplitudes propagating along reversed scattering paths. Weak interaction transforms this coherent backscattering peak into a pronounced dip, indicating destructive instead of constructive interference. We reproduce this result, obtained from the numerical integration of the Gross-Pitaevskii equation, by a diagrammatic theory of weak localization in the presence of nonlinearity.

引用

页数：4

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