Vortex stabilization in Bose-Einstein condensate of alkali-metal atom gas

被引：71

作者：

Isoshima, T ^{[1
]}

Machida, K ^{[1
]}

机构：

[1] Okayama Univ, Dept Phys, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW A | 1999年 / 59卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.59.2203

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A quantized vortex in Bose-Einstein condensation (BEC) of an alkali-metal atom gas is known to be unstable intrinsically at zero temperature. We examine two stabilization mechanisms of a vortex theoretically. (i) The finite temperature effect is shown to stabilize a vortex. (ii) An additional pinning potential, which may be produced by a focused laser beam at the vortex center, is also shown to stabilize it even at zero temperature. The mean-field calculation for BEC confined by a harmonic potential is employed. The detailed properties of a stable vortex are given, such as the spatial profiles of the condensate and noncondensate, the particle current density around the core, the whole excitation spectrum, and their temperature dependence. [S1050-2947(99)01503-6].

引用

页码：2203 / 2212

页数：10

共 43 条

[31] Bose-Einstein condensation in a confined geometry with and without a vortex [J].