Coupled-mode theory for Bose-Einstein condensates

被引：158

作者：

Ostrovskaya, EA ^{[1
]}

Kivshar, YS

Lisak, M

Hall, B

Cattani, F

Anderson, D

机构：

[1] Australian Natl Univ, Ctr Opt Sci, Canberra, ACT 0200, Australia

[2] Chalmers Univ Technol, Dept Electromagnet, S-41296 Gothenburg, Sweden

来源：

PHYSICAL REVIEW A | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.61.031601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We apply the concepts of nonlinear guided-wave optics to a Bose-Einstein condensate (BEC) trapped in an external potential. As an example, we consider a parabolic double-well potential and derive coupled-mode equations for the complex amplitudes of the BEC macroscopic collective modes. Our equations describe different regimes of the condensate dynamics, including the nonlinear Josephson effect for any separation between the wells. We demonstrate macroscopic self-trapping for both repulsive and attractive interactions, and confirm our results by direct numerical solution of the Gross-Pitaevskii-equation.

引用

页数：4

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