First and second sound modes of a Bose-Einstein condensate in a harmonic trap

被引：28

作者：

Shenoy, VB ^{[1
]}

Ho, TL ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.80.3895

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have calculated the first and second sound modes of a dilute interacting Bose gas in a spherical trap for temperatures (0.6 < T/T-c < 1.2) and for systems with 10(4) to 10(8) particles. The second sound modes (which exist only below T-c) generally have a stronger temperature dependence than the first sound modes. The puzzling temperature variations of the sound modes near T-c recently observed at JILA in systems with 10(3) particles match surprisingly well with those of the first and second sound modes of much larger systems.

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页码：3895 / 3898

页数：4

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