中国物理B ›› 2007, Vol. 16 ›› Issue (9): 2578-2583.doi: 10.1088/1009-1963/16/9/013

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Internal Josephson-like tunnelling in two-component Bose--Einstein condensates affected by sign of the atomic interaction and external trapping potential

熊波1, 刘循序2   

  1. (1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; (2)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,\\ Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2007-02-02 修回日期:2007-04-02 出版日期:2007-09-20 发布日期:2007-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10474055, 90406017, 10588402 and 60525417), the National Key Basic Research Special Foundation of China (Grant No~2005CB724508); the STCM of Shanghai, China (Grant Nos~05PJ14038, 06JC14026 and 04DZ14009).

Internal Josephson-like tunnelling in two-component Bose--Einstein condensates affected by sign of the atomic interaction and external trapping potential

Xiong Bo(熊波)† and Liu Xun-Xu(刘循序)   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2007-02-02 Revised:2007-04-02 Online:2007-09-20 Published:2007-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10474055, 90406017, 10588402 and 60525417), the National Key Basic Research Special Foundation of China (Grant No~2005CB724508); the STCM of Shanghai, China (Grant Nos~05PJ14038, 06JC14026 and 04DZ14009).

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摘要： This paper studies the Josephson-like tunnelling in two-component Bose--Einstein condensates coupled with microwave field, which is in respond to various attractive and repulsive atomic interaction under the various aspect ratio of trapping potential. It is very interesting to find that the dynamic of Josephson-like tunnelling can be controlled from fast damped oscillations to nondamped oscillation, and relative number of atoms changes from asymmetric occupation to symmetric occupation correspondingly.

关键词: Bose--Einstein, Josephson tunnelling, nonlinear

Abstract: This paper studies the Josephson-like tunnelling in two-component Bose--Einstein condensates coupled with microwave field, which is in respond to various attractive and repulsive atomic interaction under the various aspect ratio of trapping potential. It is very interesting to find that the dynamic of Josephson-like tunnelling can be controlled from fast damped oscillations to nondamped oscillation, and relative number of atoms changes from asymmetric occupation to symmetric occupation correspondingly.

Key words: Bose--Einstein, Josephson tunnelling, nonlinear

中图分类号:  (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

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