中国物理B ›› 2006, Vol. 15 ›› Issue (5): 923-926.doi: 10.1088/1009-1963/15/5/009

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Scheme for concentration of the unknown GHZ entangled states

张　刚, 杨　名, 薛正远, 曹卓良   

  1. School of Physics Material Science, Anhui University, Hefei 230039, China;Department of Mathematics Physics, West Anhui University, Lu'an 237012, China
  • 收稿日期:2005-11-28 修回日期:2005-12-28 出版日期:2006-05-20 发布日期:2006-05-20
  • 基金资助:
    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

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   

  1. a School of Physics Material Science, Anhui University, Hefei 230039, China; b Department of Mathematics Physics, West Anhui University, Lu'an 237012, China
  • Received:2005-11-28 Revised:2005-12-28 Online:2006-05-20 Published:2006-05-20
  • Supported by:
    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

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摘要： 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.

关键词: unknown GHZ entangled states, concentration, cavity QED

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.

Key words: unknown GHZ entangled states, concentration, cavity QED

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
42.50.Pq (Cavity quantum electrodynamics; micromasers)