Temperature-dependent damping and frequency shifts in collective excitations of a dilute Bose-Einstein condensate

被引：350

作者：

Jin, DS ^{[1
]}

Matthews, MR ^{[1
]}

Ensher, JR ^{[1
]}

Wieman, CE ^{[1
]}

Cornell, EA ^{[1
]}

机构：

[1] UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.78.764

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We extend to finite temperature the study of collective excitations of a Bose-Einstein condensate in a dilute gas of Rb-87. Measurements of two modes with different angular momenta show unexpected temperature-dependent frequency shifts, with very different behavior for the two symmetries; in addition there is a sharp feature in the temperature dependence of one mode. The damping of these excitations exhibits dramatic temperature dependence, with condensate modes at temperatures near the transition damping even faster than analogous noncondensate oscillations.

引用

页码：764 / 767

页数：4

共 22 条

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HUTCHINSON DAW, CONDMAT9611023

[12] Collective excitations of a Bose-Einstein condensate in a dilute gas [J].