中国物理B ›› 2007, Vol. 16 ›› Issue (3): 640-643.doi: 10.1088/1009-1963/16/3/014

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Scheme for entanglement concentration of unknown W class states via linear optics

曹卓良1, 董萍1, 章礼华2   

  1. (1)School of Physics & Material Science, Anhui University, Hefei 230039, China; (2)School of Physics & Material Science, Anhui University, Hefei 230039, China;Department of Physics, Anqing Teachers College, Anqing 246011, China
  • 收稿日期:2006-06-23 修回日期:2006-07-09 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the Natural Science Foundation of the Education Department of Anhui Province, China (Grant No~2006kj070A) and Anhui Provincial Natural Science Foundation, China (Grant No~03042401) and the Talent Foundation of Anhui University, China.

Scheme for entanglement concentration of unknown W class states via linear optics

Zhang Li-Hua(章礼华)a)b)† , Dong Ping(董萍)a), and Cao Zhuo-Liang(曹卓良)a)‡   

  1. a School of Physics & Material Science, Anhui University, Hefei 230039, China; b Department of Physics, Anqing Teachers College, Anqing 246011, China
  • Received:2006-06-23 Revised:2006-07-09 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the Natural Science Foundation of the Education Department of Anhui Province, China (Grant No~2006kj070A) and Anhui Provincial Natural Science Foundation, China (Grant No~03042401) and the Talent Foundation of Anhui University, China.

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摘要： This paper proposes a scheme for entanglement concentration of unknown triparticle $W$ class states with a certain probability. This protocol is mainly based on the coincidences of single-photon detectors and requires single-photon detectors and linear optical elements. The scheme is feasible within current technology.

关键词: entanglement concentration, W state, linear optical elements

Abstract: This paper proposes a scheme for entanglement concentration of unknown triparticle $W$ class states with a certain probability. This protocol is mainly based on the coincidences of single-photon detectors and requires single-photon detectors and linear optical elements. The scheme is feasible within current technology.

Key words: entanglement concentration, W state, linear optical elements

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 42.79.Fm (Reflectors, beam splitters, and deflectors)