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

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【作者】 郑小娟； 曹帅； 方卯发； 廖湘萍；

【Author】 Zheng Xiao-Juan a)c),Cao Shuai b)c),Fang Mao-Fa c),and Liao Xiang-Ping d) 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

【机构】 School of Physics Science and Technology,Central South University,Changsha 410083,China； College of Physics and Information Science,Hunan Normal University； College of Sciences,South China Agricultural University,Guangzhou 510642,China； Department of Physics,Hunan Industrial University；

【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.

【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.

【关键词】 entanglement； quantum dense coding； trapped ions； decoherence-free state；
【Key words】 entanglement； quantum dense coding； trapped ions； decoherence-free state；
【基金】 Project supported by the Important Program of Hunan Provincial Education Department (Grant No 06A038);Department of Education of Hunan Province (Grant No 06C080);Hunan Provincial Natural Science Foundation,China (Grant No 06JJ4003)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2008年02期
  • 【分类号】O431.2;TN918.1
  • 【被引频次】7
  • 【下载频次】10
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