Observation of superfluid flow in a Bose-Einstein condensed gas

被引：289

作者：

Onofrio, R

Raman, C

Vogels, JM

Abo-Shaeer, JR

Chikkatur, AP

Ketterle, W

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.85.2228

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the hydrodynamic flow in a Bose-Einstein condensate stirred by a macroscopic object, a blue-detuned laser beam, using nondestructive in situ phase contrast imaging. A critical velocity fur the onset of a pressure gradient has been observed, and shown to be density dependent. The technique has been compared to a calorimetric method used previously to measure the heating induced by the motion of the laser beam.

引用

收藏

页码：2228 / 2231

页数：4

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