Observation of the scissors mode and evidence for superfluidity of a trapped Bose-Einstein condensed gas

被引：243

作者：

Maragò, OM ^{[1
]}

Hopkins, SA ^{[1
]}

Arlt, J ^{[1
]}

Hodby, E ^{[1
]}

Hechenblaikner, G ^{[1
]}

Foot, CJ ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.84.2056

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of the scissors mode of a Bose-Einstein condensed gas of Rb-87 atoms in a magnetic trap, which gives direct evidence of superfluidity in this system. The scissors mode of oscillation is excited by a sudden rotation of the anisotropic trapping potential. For a gas above T-c (normal fluid) we detect the occurrence of oscillations at two frequencies, with the lower frequency corresponding to the rigid body value of the moment of inertia. Well below T-c the condensate oscillates at a single frequency, without damping, as expected for a superfluid.

引用

页码：2056 / 2059

页数：4

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