中国物理B ›› 2004, Vol. 13 ›› Issue (12): 2021-2024.doi: 10.1088/1009-1963/13/12/008

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Generation and application of a controllable multi-atom entangled state

黄燕霞1, 詹明生2   

  1. (1)Department of Physics, Hubei Normal University, Huangshi 435002, China; State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; (2)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
  • 收稿日期:2003-12-22 修回日期:2004-07-06 出版日期:2004-12-17 发布日期:2005-03-17
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10074072).

Generation and application of a controllable multi-atom entangled state

Huang Yan-Xia (黄燕霞)ab, Zhan Ming-Sheng (詹明生)b   

  1. a Department of Physics, Hubei Normal University, Huangshi 435002, China; b State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2003-12-22 Revised:2004-07-06 Online:2004-12-17 Published:2005-03-17
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10074072).

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摘要： In this paper, we present a scheme to prepare a set of the multi-atom entangled states by the cavity quantum electrodynamics (QED) technology. The multi-atom entangled states have some particular entanglement properties. For example, the remaining reduced density matrices ρ_{ij} still retain entanglement or disentanglement when any N-2 atoms of the N atoms are traced out, which can be chosen freely according to our need, and the relative entanglement strength of any pair of atoms (measured by the concurrence) can be arbitrarily adjusted. In addition, they may be completely symmetric under the exchange of any two atoms, and perform certain quantum information tasks, such as telecloning, teleportation, secret sharing and so on.

关键词: multi-atom entangled states, QED, telecloning

Abstract: In this paper, we present a scheme to prepare a set of the multi-atom entangled states by the cavity quantum electrodynamics (QED) technology. The multi-atom entangled states have some particular entanglement properties. For example, the remaining reduced density matrices $\rho_{ij}$ still retain entanglement or disentanglement when any N-2 atoms of the N atoms are traced out, which can be chosen freely according to our need, and the relative entanglement strength of any pair of atoms (measured by the concurrence) can be arbitrarily adjusted. In addition, they may be completely symmetric under the exchange of any two atoms, and perform certain quantum information tasks, such as telecloning, teleportation, secret sharing and so on.

Key words: multi-atom entangled states, QED, telecloning

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn
03.67.Hk (Quantum communication) 03.67.Dd (Quantum cryptography and communication security) 42.50.Pq (Cavity quantum electrodynamics; micromasers)