Direct observation of irrotational flow and evidence of superfluidity in a rotating Bose-Einstein condensate -: art. no. 070406

被引：32

作者：

Hechenblaikner, G ^{[1
]}

Hodby, E ^{[1
]}

Hopkins, SA ^{[1
]}

Maragò, OM ^{[1
]}

Foot, CJ ^{[1
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.88.070406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed the expansion of vortex-free, rotating Bose condensates after their sudden release from a slowly rotating anisotropic trap. Conservation of angular momentum, combined with the constraint of irrotational flow, cause the rotating condensate to expand in a distinctively different way to one released from a static (nonrotating) trap. This difference provides clear experimental evidence of the purely irrotational velocity field associated with a superfluid. We observed this behavior in absorption images taken along the rotation axis.

引用

页数：4

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