| Continuous-variable quantum teleportation of even and odd coherent states through varied gain channels |
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| 作者姓名： | 李 英 张 静 张俊香 张天才 |
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| 作者单位： | State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China;Institute of Quantum Optics Quantum Information Science and Department of Physics,Shangluo Normal College, Shangzhou, 726000, China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos 10434080, 10374062, 60578018),NSFC-RFBR Joint Program, Research Funds for Returned Scholar Abroad from Shanxi
Province and also supported by the CFKSTIP (Grant No 705010) and PCSIRT from Ministry of Education of China. |
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| 摘 要： |
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| 关 键 词： | 量子运输 奇偶连贯态 保真度 理论物理 |
| 收稿时间： | 9/1/2005 12:00:00 AM |
| 修稿时间： | 2005-10-012006-01-21 |
Continuous-variable quantum teleportation of even and odd coherent states through varied gain channels |
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| Li Ying,Zhang Jing,Zhang Jun-Xiang and Zhang Tian-Cai.Continuous-variable quantum teleportation of even and odd coherent states through varied gain channels[J].Chinese Physics B,2006,15(8):1766-1771. |
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| Authors: | Li Ying Zhang Jing Zhang Jun-Xiang and Zhang Tian-Cai |
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| Institution: | State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China; State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006 China;Institute of Quantum Optics Quantum Information Science and Department of Physics,Shangluo Normal College, Shangzhou, 726000, China |
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| Abstract: | This paper has investigated quantum teleportation of even and odd coherent states in
terms of the EPR entanglement states for continuous variables. It discusses the
relationship between the fidelity and the entanglement of EPR states, which is
characterized by the degree of squeezing and the gain of classical channels. It
shows that the quality of teleporting quantum states also depends on the
characteristics of the states themselves. The properties of teleporting even and odd
coherent states at different intensities are investigated. The difference of
teleporting two such kinds of quantum states are analysed based on the quantum
distance function. |
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| Keywords: | quantum teleportation odd and even coherent state fidelity |
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