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The dependence of fidelity on the squeezing parameter in teleportation of the squeezed coherent statesvglue4pt |
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| Authors: | Zhang Jing-Tao He Guang-Qiang Ren Li-Jie and Zeng Gui-Hua |
| Institution: | State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems,Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems,Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems,Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems,Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China |
| Abstract: | This paper investigates an analytical expression of teleportation fidelity in the teleportation scheme of a single mode of electromagnetic field. The fidelity between the original squeezed coherent state and the teleported one is expressed in terms of the squeezing parameter r and the quantum channel parameter (two-mode squeezed state) p. The results of analysis show that the fidelity increases with the increase of the quantum channel parameter p, while the fidelity decreases with the increase of the squeezing parameter r of the squeezed state. Thus the coherent state (r=0) is the best quantum signal for continuous variable quantum teleportation once the quantum channel is built. |
| Keywords: | quantum teleportation the squeezed coherent states fidelity |
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