中国物理B ›› 2008, Vol. 17 ›› Issue (7): 2514-2516.doi: 10.1088/1674-1056/17/7/028

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Distillation of bi-partite entanglement from W state with cavity QED

邓黎, 陈爱喜, 陈德海, 黄克林   

  1. Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
  • 收稿日期:2007-10-13 修回日期:2007-10-18 出版日期:2008-07-09 发布日期:2008-07-09
  • 基金资助:
    Project supported by Natural Science Foundation of Jiangxi, China, (Grant Nos 0612006 and 2007GZW0819), the Scientific Research Foundation of Jiangxi Provincial Department of Education of China, (Grant No [2007]191), and the Funds from East China Jiaotong University.

Distillation of bi-partite entanglement from W state with cavity QED

Deng Li(邓黎), Chen Ai-Xi(陈爱喜)†, Chen De-Hai(陈德海), and Huang Ke-Lin(黄克林)   

  1. Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
  • Received:2007-10-13 Revised:2007-10-18 Online:2008-07-09 Published:2008-07-09
  • Supported by:
    Project supported by Natural Science Foundation of Jiangxi, China, (Grant Nos 0612006 and 2007GZW0819), the Scientific Research Foundation of Jiangxi Provincial Department of Education of China, (Grant No [2007]191), and the Funds from East China Jiaotong University.

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摘要： Following the theoretical protocol described by Fortescue and Lo [Fortescue B and Lo H K 2007 {\it Phys. Rev. Lett.} {\bf 98} 260501], we present a scheme in which one can distill maximally entangled bi-partite states from a tri-partite $W$ state with cavity QED. Our scheme enables the concrete physical system to realize its protocol. In our scheme, the rate distillation also asymptotically approaches one. Based on the present cavity QED techniques, we discuss the experimental feasibility.

关键词: entanglement distillation, $W$ state, cavity QED

Abstract: Following the theoretical protocol described by Fortescue and Lo [Fortescue B and Lo H K 2007 Phys. Rev. Lett. 98 260501], we present a scheme in which one can distill maximally entangled bi-partite states from a tri-partite $W$ state with cavity QED. Our scheme enables the concrete physical system to realize its protocol. In our scheme, the rate distillation also asymptotically approaches one. Based on the present cavity QED techniques, we discuss the experimental feasibility.

Key words: entanglement distillation, $W$ state, cavity QED

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Pq (Cavity quantum electrodynamics; micromasers)