咨询与建议

看过本文的还看了

相关文献

该作者的其他文献

CADAL相关文献

文献详情 >Collective oscillations in two... 收藏

Collective oscillations in two-dimensional Bose–Einstein condensate

作     者:Arup Banerjee 

作者机构:Laser Physics Division Centre for Advanced Technology Indore 452013 India 

出 版 物:《Physics letters. A》 

年 卷 期:2004年第332卷第3-4期

页      面:291-297页

学科分类:0702[理学-物理学类] 

主  题:SUM-RULES  GAS  EXCITATIONS  MODES 

摘      要:We study the effect of lower-dimensional geometry on the frequencies of the collective oscillations of a Bose-Einstein condensate confined in a trap. To study the effect of two-dimensional geometry we consider a pancake-shaped condensate confined in a harmonic trap and employ various models for the coupling constant depending on the thickness of the condensate relative to the value of the scattering length. These models correspond to different scattering regimes ranging from quasi-three-dimensional to strictly two-dimensional regimes. Using these models for the coupling parameter and sum rule approach of the many-body response theory we derive analytical expressions for the frequencies of the monopole and the quadrupole modes. We show that the frequencies of monopole mode of the collective oscillations are significantly altered by the reduced dimensionality and also study the evolution of the frequencies as the system makes transition from one regime to another. (C) 2004 Elsevier B.V. All rights reserved.

读者评论 与其他读者分享你的观点

用户名:未登录
我的评分