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)
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
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.
Received: 27 June 2007
Revised: 29 June 2007
Accepted manuscript online:
PACS:
03.65.Yz
(Decoherence; open systems; quantum statistical methods)
Fund: 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).
Cite this article:
Zheng Xiao-Juan(郑小娟), Cao Shuai(曹帅), Fang Mao-Fa(方卯发), and Liao Xiang-Ping(廖湘萍) Scheme for implementing quantum dense coding with four-particle decoherence-free states in an ion trap 2008 Chin. Phys. B 17 431
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