中国物理B ›› 2007, Vol. 16 ›› Issue (7): 1883-1888.doi: 10.1088/1009-1963/16/7/013

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An optical scheme for conditional generation of W state and photon-added coherent state

景辉1, 詹明生1, 李燕2   

  1. (1)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; (2)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China;Gra
  • 收稿日期:2006-07-15 修回日期:2006-11-14 出版日期:2007-07-20 发布日期:2007-07-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10304020 and 10474117), the State Key Development Program for Basic Research of China (Grant No~2001CB309309), and also in part by the Sunshine Project of Wuhan, China.

An optical scheme for conditional generation of W state and photon-added coherent state

Li Yan(李燕)a)b)c)†, Jing Hui(景辉)a)b)‡, and Zhan Ming-Sheng(詹明生)a)b)   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, Chinab Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
  • Received:2006-07-15 Revised:2006-11-14 Online:2007-07-20 Published:2007-07-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10304020 and 10474117), the State Key Development Program for Basic Research of China (Grant No~2001CB309309), and also in part by the Sunshine Project of Wuhan, China.

摘要: We propose a simple scheme to generate an arbitrary photon-added coherent state of a travelling optical field by combining an array of degenerate parametric amplifiers and corresponding single-photon detectors. Particularly, when the single-photon-added coherent state is observed by developing the novel technique of Zavatta et al (2004 Science 306 660), we can simultaneously obtain the generalized N -qubit W state.

关键词: photon-added coherent state, W state, parametric down-conversion

Abstract: We propose a simple scheme to generate an arbitrary photon-added coherent state of a travelling optical field by combining an array of degenerate parametric amplifiers and corresponding single-photon detectors. Particularly, when the single-photon-added coherent state is observed by developing the novel technique of Zavatta et al (2004 Science 306 660), we can simultaneously obtain the generalized N-qubit W state.

Key words: photon-added coherent state, W state, parametric down-conversion

中图分类号: 

  • 42.50.Ar