Damping in dilute Bose gases: A mean-field approach

被引：158

作者：

Giorgini, S

机构：

[1] European Ctr Theoret Studies Nucl Phys & Related, I-38050 Villazzano, Italy

[2] Univ Trento, Ist Nazl Fis Mat, I-38050 Povo, Italy

来源：

PHYSICAL REVIEW A | 1998年 / 57卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.57.2949

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Damping in a dilute Bose gas is investigated using a mean-field approximation which describes the coupled oscillations of condensate and noncondensate atoms in the collisionless regime. Explicit results for both Landau and Beliaev damping rates are given for nonuniform gases. In the case of uniform systems, we obtain results for the damping of phonons both at zero and finite temperature. The isothermal compressibility of a uniform gas is also discussed.

引用

页码：2949 / 2957

页数：9

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