中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1477-1486.doi: 10.1088/1009-1963/13/9/021

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Entanglement and photon statistics of output fields from beam splitter for binomial state inputs

方卯发1, 周清平2   

  1. (1)Department of Physics, Hunan Normal University, Changsha 410081, China; Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (2)Department of Physics, Hunan Normal University, Changsha 410081, China; Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; Department of Mathematics and Computer Science, Jishou University, Zhangjiajie 427000,
  • 收稿日期:2004-02-05 修回日期:2004-05-08 出版日期:2004-06-21 发布日期:2005-06-21
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025) and the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No 01c260).

Entanglement and photon statistics of output fields from beam splitter for binomial state inputs

Zhou Qing-Ping (周清平)abc, Fang Mao-Fa (方卯发)ab    

  1. a Department of Physics, Hunan Normal University, Changsha 410081, Chinab Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; c Department of Mathematics and Computer Science, Jishou University, Zhangjiajie 427000, China
  • Received:2004-02-05 Revised:2004-05-08 Online:2004-06-21 Published:2005-06-21
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025) and the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No 01c260).

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摘要： The entanglement properties are investigated based on linear entropy, and nonclassicalities are examined of output fields from a beam splitter for pure binomial state inputs. It is shown that the properties of the entanglement and the photon statistics of output fields are not only strongly dependent on the parameters of input binomial states but also quite involved with the nature of the beam splitter. The best entanglement can be obtained when the parameters of both input states and the beam splitter are chosen appropriately. Finally, we analyse briefly the distinguishability between the joint input state and the joint output state.

关键词: entanglement, photon statistics, distinguishability, beam splitter, binomial states, linear entropy, Q-parameter

Abstract: The entanglement properties are investigated based on linear entropy, and nonclassicalities are examined of output fields from a beam splitter for pure binomial state inputs. It is shown that the properties of the entanglement and the photon statistics of output fields are not only strongly dependent on the parameters of input binomial states but also quite involved with the nature of the beam splitter. The best entanglement can be obtained when the parameters of both input states and the beam splitter are chosen appropriately. Finally, we analyse briefly the distinguishability between the joint input state and the joint output state.

Key words: entanglement, photon statistics, distinguishability, beam splitter, binomial states, linear entropy, Q-parameter

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
42.79.Fm (Reflectors, beam splitters, and deflectors)