Collective Excitations and Nonlinear Dynamics of 1D BEC with Two- and Three-body Interactions in Anharmonic Traps

被引：0
|
作者：
Li Guan-Qiang [1 ]
Peng Ping [1 ]
Liu Jian-Ke [1 ]
Xue Ju-Kui [2 ]
机构：
[1] Shaanxi Univ Sci & Technol, Fac Sci, Xian 710021, Peoples R China
[2] NW Normal Univ, Phys Elect Engn Coll, Lanzhou 730070, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2008年 / 50卷 / 05期
基金：
中国国家自然科学基金;
关键词：
collective excitations; Gross-Pitaevskii-Ginzburg equation; anharmonic trapping potentials; frequency shift of low-energy excitations; non-resonant mode coupling;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The collective excitations of low-dimensional Bose-Einstein condensates with two- and three-body interactions in an harmonic potentials are investigated. Using the standard variational approach , the governing equations of motions for the low-energy excitations are obtained by solving time-dependent Gross-Pitaevskii-Ginzburg equation , and the excitation spectrums are calculated in small amplitude limit. The frequency shift and nonlinear mode coupling induced by the anharmonic distortion (adding cubic, quartic, or quintic term to a harmonic trap) are studied.
引用
收藏
页码：1129 / 1136
页数：8
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