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.
Received: 23 June 2006
Revised: 09 July 2006
Accepted manuscript online:
Fund: 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.
Cite this article:
Zhang Li-Hua(章礼华), Dong Ping(董萍), and Cao Zhuo-Liang(曹卓良) Scheme for entanglement concentration of unknown W class states via linear optics 2007 Chinese Physics 16 640
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