中国物理B ›› 2008, Vol. 17 ›› Issue (3): 971-977.doi: 10.1088/1674-1056/17/3/038

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Effects of dipole--dipole interaction on entanglement transfer

郭红, 熊恒娜   

  1. College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079, China
  • 收稿日期:2007-04-29 修回日期:2007-09-12 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60478049), the Natural Science Foundation of Hubei Province, China (Grant No 2006ABB015) and the Natural Science Foundation of Huazhong Normal University, China.

Effects of dipole--dipole interaction on entanglement transfer

Guo Hong(郭红)† and Xiong Heng-Na(熊恒娜)   

  1. College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079, China
  • Received:2007-04-29 Revised:2007-09-12 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60478049), the Natural Science Foundation of Hubei Province, China (Grant No 2006ABB015) and the Natural Science Foundation of Huazhong Normal University, China.

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摘要： A system consisting of two different atoms interacting with a two-mode vacuum, where each atom is resonant only with one cavity mode, is considered. The effects of dipole--dipole ({dd}) interaction between two atoms on the atom--atom entanglement and mode--mode entanglement are investigated. For a weak {dd} interaction, when the atoms are initially separable, the entanglement between them can be induced by the {dd} interaction, and the entanglement transfer between the atoms and the modes occurs efficiently; when the atoms are initially entangled, the entanglement transfer is almost not influenced by the {dd} interaction. However, for a strong {dd} interaction, it is difficult to transfer the entanglement from the atoms to the modes, but the atom--atom entanglement can be maintained when the atoms are initially entangled.

关键词: dipole--dipole (dd) interaction, concurrence, entanglement transfer

Abstract: A system consisting of two different atoms interacting with a two-mode vacuum, where each atom is resonant only with one cavity mode, is considered. The effects of dipole--dipole (dd) interaction between two atoms on the atom--atom entanglement and mode--mode entanglement are investigated. For a weak dd interaction, when the atoms are initially separable, the entanglement between them can be induced by the dd interaction, and the entanglement transfer between the atoms and the modes occurs efficiently; when the atoms are initially entangled, the entanglement transfer is almost not influenced by the dd interaction. However, for a strong dd interaction, it is difficult to transfer the entanglement from the atoms to the modes, but the atom--atom entanglement can be maintained when the atoms are initially entangled.

Key words: dipole--dipole (dd) interaction, concurrence, entanglement transfer

中图分类号:  (Quantum description of interaction of light and matter; related experiments)

  • 42.50.Ct
37.10.Gh (Atom traps and guides)