中国物理B ›› 2011, Vol. 20 ›› Issue (5): 50311-050311.doi: 10.1088/1674-1056/20/5/050311

• GENERAL • 上一篇    下一篇

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

张静涛, 何广强, 任李杰, 曾贵华   

  1. 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
  • 收稿日期:2010-10-05 修回日期:2010-10-18 出版日期:2011-05-15 发布日期:2011-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60773085, 60801051, and 60970109), the National Natural Science Foundation of China--Korea Science and Engineering Foundation International Collaborative Research Funds (Gra

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

Zhang Jing-Tao (张静涛), He Guang-Qiang (何广强), Ren Li-Jie (任李杰), Zeng Gui-Hua (曾贵华)   

  1. 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
  • Received:2010-10-05 Revised:2010-10-18 Online:2011-05-15 Published:2011-05-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60773085, 60801051, and 60970109), the National Natural Science Foundation of China–Korea Science and Engineering Foundation International Collaborative Research Funds (Grant Nos. 60811140346 and F01-2008-000-10021-0), and Shanghai Jiao Tong University Participation in Research Pro-gram, China (Grant Nos. T030PRP18001 and T03013002).

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摘要： 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.

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.

Key words: quantum teleportation, the squeezed coherent states, fidelity

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Lx (Quantum computation architectures and implementations)