Gapless finite-T theory of collective modes of a trapped gas

被引：96

作者：

Hutchinson, DAW

Dodd, RJ

Burnett, K

机构：

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

[2] Technol Adm, Div Electron & Opt Phys, Natl Inst Stand & Technol, US Dept Commerce, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.81.2198

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present predictions for the frequencies of collective modes of trapped Bose-condensed Rb-87 atoms at finite temperature. Our treatment includes a self-consistent treatment of the effects upon the mean field from finite-T excitations and the anomalous average. This is the first gapless [A. Griffin, Phys. Rev. B 53, 9341 (1996)] calculation of this type for a trapped Bose-Einstein condensed gas. The corrections quantitatively account for the downward shift in the m = 2 excitation frequencies observed in recent experiments as the critical temperature is approached.

引用

页码：2198 / 2200

页数：3

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