中国物理B ›› 2008, Vol. 17 ›› Issue (2): 431-434.doi: 10.1088/1674-1056/17/2/014

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Scheme for implementing quantum dense coding with four-particle decoherence-free states in an ion trap

方卯发1, 曹 帅2, 廖湘萍3, 郑小娟4   

  1. (1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)College of Sciences, South China Agricultural University, Guangzhou 510642, China;College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (3)Department of Physics, Hunan Industrial University, Zhuzhou 412000, China; (4)School of Physics Science and Technology, Central South University, Changsha 410083, China;College of Physics and Information Science, Hunan Norm
  • 收稿日期:2007-06-27 修回日期:2007-06-29 出版日期:2008-02-20 发布日期:2008-02-20
  • 基金资助:
    Project supported by the Important Program of Hunan Provincial Education Department (Grant No 06A038), Department of Education of Hunan Province (Grant No 06C080), and Hunan Provincial Natural Science Foundation, China (Grant No 06JJ4003).

Scheme for implementing quantum dense coding with four-particle decoherence-free states in an ion trap

Zheng Xiao-Juan(郑小娟)a)c)†, Cao Shuai(曹帅)b)c), Fang Mao-Fa(方卯发)c), and Liao Xiang-Ping(廖湘萍)d)   

  1. a School of Physics Science and Technology, Central South University, Changsha 410083, China; b College of Sciences, South China Agricultural University, Guangzhou 510642, China; c College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; d Department of Physics, Hunan Industrial University, Zhuzhou 412000, China
  • Received:2007-06-27 Revised:2007-06-29 Online:2008-02-20 Published:2008-02-20
  • Supported by:
    Project supported by the Important Program of Hunan Provincial Education Department (Grant No 06A038), Department of Education of Hunan Province (Grant No 06C080), and Hunan Provincial Natural Science Foundation, China (Grant No 06JJ4003).

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摘要： This paper proposes an experimentally feasible scheme for implementing quantum dense coding of trapped-ion system in decoherence-free states. As the phase changes due to time evolution of components with different eigenenergies of quantum superposition are completely frozen, quantum dense coding based on this model would be perfect. The scheme is insensitive to heating of vibrational mode and Bell states can be exactly distinguished via detecting the ionic state.

关键词: entanglement, quantum dense coding, trapped ions, decoherence-free state

Abstract: This paper proposes an experimentally feasible scheme for implementing quantum dense coding of trapped-ion system in decoherence-free states. As the phase changes due to time evolution of components with different eigenenergies of quantum superposition are completely frozen, quantum dense coding based on this model would be perfect. The scheme is insensitive to heating of vibrational mode and Bell states can be exactly distinguished via detecting the ionic state.

Key words: entanglement, quantum dense coding, trapped ions, decoherence-free state

中图分类号:  (Decoherence; open systems; quantum statistical methods)

  • 03.65.Yz
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements)