Effective one-component description of two-component Bose-Einstein condensate dynamics

被引：12

作者：

Dutton, Z ^{[1
]}

Clark, CW ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Electron & Opt Div, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.71.063618

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate dynamics in two-component Bose-Einstein condensates in the context of coupled Gross-Pitaevskii equations and derive results for the evolution of the total density fluctuations. Using these results, we show how, in many cases of interest, the dynamics can be accurately described with an effective one-component Gross-Pitaevskii equation for one of the components, with the trap and interaction coefficients determined by the relative differences in the scattering lengths. We discuss the model in various regimes, where it predicts breathing excitations, and the formation of vector solitons. An effective nonlinear evolution is predicted for some cases of current experimental interest. We then apply the model to construct quasistationary states of two-component condensates.

引用

页数：7

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