Continuous-variable quantum teleportation of even and odd coherent states through varied gain channels |
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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; 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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