中国物理B ›› 2007, Vol. 16 ›› Issue (3): 834-839.doi: 10.1088/1009-1963/16/3/046

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Energy spectrum and entanglement of two tunnel- coupled Bose--Einstein condensates

程茸, 梁九卿   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2005-09-26 修回日期:2005-11-04 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by National Natural Science Foundation of China (Grant No 10475053).

Energy spectrum and entanglement of two tunnel- coupled Bose--Einstein condensates

Cheng Rong(程茸)† and Liang Jiu-Qing(梁九卿)   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • Received:2005-09-26 Revised:2005-11-04 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by National Natural Science Foundation of China (Grant No 10475053).

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摘要： This paper obtains the energy-spectrum and eigenstate corrections of two-mode Bose--Einstein condensates (BECs) coupled by quantum tunnelling by perturbation method in both strong and weak tunnelling regions. The population imbalance between two BECs are then studied in terms of the low-lying eigenstates which also characterize the intrinsic entanglement between the two-mode BECs. The strong parity effect in the weak tunnelling region is also investigated.

Abstract: This paper obtains the energy-spectrum and eigenstate corrections of two-mode Bose--Einstein condensates (BECs) coupled by quantum tunnelling by perturbation method in both strong and weak tunnelling regions. The population imbalance between two BECs are then studied in terms of the low-lying eigenstates which also characterize the intrinsic entanglement between the two-mode BECs. The strong parity effect in the weak tunnelling region is also investigated.

Key words: energy spectrum, entanglement, Bose--Einstein condensates

中图分类号:  (Entanglement and decoherence in Bose-Einstein condensates)

  • 03.75.Gg
03.65.Xp (Tunneling, traversal time, quantum Zeno dynamics) 03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)