The dependence of fidelity on the squeezing parameter in teleportation of the squeezed coherent states

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 channe...

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Published inChinese physics B Vol. 20; no. 5; pp. 101 - 104
Main Author 张静涛 何广强 任李杰 曾贵华
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.05.2011
Subjects
Channels
Coherence
Compressing
Electromagnetic fields
Exact solutions
Mathematical analysis
Quantum teleportation
Teleportation
保真度
压缩相干态
挤压参数
解析表达式
远距传物
量子通道
隐形传态
隐形传输
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/5/050311

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Summary: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= O） is the best quantum signal for continuous variable quantum teleportation once the quantum channel is built.
Bibliography: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= O） is the best quantum signal for continuous variable quantum teleportation once the quantum channel is built.
quantum teleportation, the squeezed coherent states, fidelity
Zhang Jing-Tao, He Guang-Qiang, Ren Li-Jie, Zeng Gui-Hua 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
11-5639/O4
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/5/050311