中国物理B ›› 2004, Vol. 13 ›› Issue (7): 988-989.doi: 10.1088/1009-1963/13/7/003

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Generation of Bell states in two-component Bose－Einstein condensates

梁九卿1, 张国锋2, 殷雯2, 严启伟3   

  1. (1)Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; (2)Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; (3)State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-11-03 修回日期:2003-12-01 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10075032).

Generation of Bell states in two-component Bose－Einstein condensates

Zhang Guo-Feng (张国锋)ab, Yin Wen (殷雯)ab, Liang Jiu-Qing (梁九卿)a, Yan Qi-Wei (严启伟)b   

  1. a Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; b  State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-11-03 Revised:2003-12-01 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10075032).

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摘要： We examine analytically the generation of Bell state in Bose condensates of two interacting species trapped in a double well configuration. The density of probability for finding the entangled Bell state is given. The effect of the tunnelling rate and the interspecies interaction strength on the generation of Bell state is discussed. We find that the oscillation amplitude of the density of probability for finding the entangled Bell state becomes greater as the tunnelling rate Ω increases, and the self-interaction strength of the component A(B) has no effect on it.

关键词: quantum entanglement, Bose-Einstein condensates

Abstract: We examine analytically the generation of Bell state in Bose condensates of two interacting species trapped in a double well configuration. The density of probability for finding the entangled Bell state is given. The effect of the tunnelling rate and the interspecies interaction strength on the generation of Bell state is discussed. We find that the oscillation amplitude of the density of probability for finding the entangled Bell state becomes greater as the tunnelling rate $\varOmega$ increases, and the self-interaction strength of the component A(B) has no effect on it.

Key words: quantum entanglement, Bose-Einstein condensates

中图分类号:  (Mechanical effects of light on atoms, molecules, and ions)

  • 37.10.Vz
03.75.Gg (Entanglement and decoherence in Bose-Einstein condensates) 03.65.Ud (Entanglement and quantum nonlocality) 03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)