Scheme for concentration of the unknown GHZ entangled states
Zhang Gang (张 刚)ab, Yang Ming (杨 名)a, Xue Zheng-Yuan (薛正远)a, Cao Zhuo-Liang (曹卓良)a
a School of Physics Material Science, Anhui University, Hefei 230039, China; b Department of Mathematics Physics, West Anhui University, Lu'an 237012, China
Abstract We propose two schemes for concentrating unknown nonmaximally tripartite GHZ entangled states via cavity quantum electrodynamics (QED) techniques. The finial pure states obtained from the two schemes are shared by two or three parties. Our schemes only require large-detuned interaction between two driven atoms and the quantized cavity mode, which is insensitive to both the cavity decay and thermal field, thus the schemes are well within current experimental technology.
Received: 28 November 2005
Revised: 28 December 2005
Accepted manuscript online:
Fund: Project supported by the Natural Science Foundation of the Education Department of Anhui Province, China (Grant Nos 2004kj005zd and 2005kj235) and Anhui Provincial Natural Science Foundation, China (Grant No 03042401) and the Talent Foundation of Anhui Un
Cite this article:
Zhang Gang (张 刚), Yang Ming (杨 名), Xue Zheng-Yuan (薛正远), Cao Zhuo-Liang (曹卓良) Scheme for concentration of the unknown GHZ entangled states 2006 Chinese Physics 15 923
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