中国物理B ›› 2007, Vol. 16 ›› Issue (9): 2584-2586.doi: 10.1088/1009-1963/16/9/014

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Realistic teleportation of coherent states using squeezed vacuum states

张为俊1, 闫伟2   

  1. (1)Department of Physics, Qufu Normal University, Qufu 273165, China\\; (2)Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics,\\ Chinese Academy of Sciences, Hefei 230031, China;Department of Physics, Qufu Normal University, Qufu 273165, China\
  • 收稿日期:2006-12-18 修回日期:2007-01-04 出版日期:2007-09-20 发布日期:2007-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 20477043).

Realistic teleportation of coherent states using squeezed vacuum states

Yan Wei(闫伟)a)b)† and Zhang Wei-Jun(张为俊)b)   

  1. a Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; b Department of Physics, Qufu Normal University, Qufu 273165, China
  • Received:2006-12-18 Revised:2007-01-04 Online:2007-09-20 Published:2007-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 20477043).

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摘要： This paper presents a realistic scheme for the teleportation of coherent states in which a two-mode squeezed vacuum state serves as the quantum channel and the position-sum and momentum-difference of two local modes serve as the measuring observables. The average fidelity of the teleportation of coherent states is derived for finite squeezing parameters and it turns out that fidelity greater than 1/2 cannot be achieved by using a classical channel alone and the probability distribution of the measurement result is a Gaussian distribution around the unknown parameter of the input coherent state with a width given by the squeezing parameter.

关键词: quantum teleportation, coherent states, squeezed vacuum states

Abstract: This paper presents a realistic scheme for the teleportation of coherent states in which a two-mode squeezed vacuum state serves as the quantum channel and the position-sum and momentum-difference of two local modes serve as the measuring observables. The average fidelity of the teleportation of coherent states is derived for finite squeezing parameters and it turns out that fidelity greater than 1/2 cannot be achieved by using a classical channel alone and the probability distribution of the measurement result is a Gaussian distribution around the unknown parameter of the input coherent state with a width given by the squeezing parameter.

Key words: quantum teleportation, coherent states, squeezed vacuum states

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements)