中国物理B ›› 2013, Vol. 22 ›› Issue (3): 30305-030305.doi: 10.1088/1674-1056/22/3/030305

• GENERAL • 上一篇    下一篇

Efficient three-step entanglement concentration for an arbitrary four-photon cluster state

司斌a, 苏石磊a, 孙立莉b, 程留永b, 王洪福a c, 张寿a   

  1. a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
    b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    c School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2012-04-09 修回日期:2012-09-28 出版日期:2013-02-01 发布日期:2013-02-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042), the Talent Program of Yanbian University, China (Grant No. 950010001), the National Science Foundation for Post-doctoral Scientists of China (Grant No. 2012M520612), and the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province, China (Grant No. 201316).

Efficient three-step entanglement concentration for an arbitrary four-photon cluster state

Si Bin (司斌)a, Su Shi-Lei (苏石磊)a, Sun Li-Li (孙立莉)b, Cheng Liu-Yong (程留永)b, Wang Hong-Fu (王洪福)a c, Zhang Shou (张寿)a   

  1. a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
    b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    c School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • Received:2012-04-09 Revised:2012-09-28 Online:2013-02-01 Published:2013-02-01
  • Contact: Zhang Shou E-mail:szhang@ybu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042), the Talent Program of Yanbian University, China (Grant No. 950010001), the National Science Foundation for Post-doctoral Scientists of China (Grant No. 2012M520612), and the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province, China (Grant No. 201316).

摘要: We propose an entanglement concentration protocol (ECP) to concentrate an arbitrary partially-entangled four-photon cluster state. As a pioneering three-step entanglement concentration scheme, our protocol only needs single-photon resource to assist the concentration in each step, which makes this protocol more economical. With the help of the linear optical elements and weak cross-Kerr nonlinearity, one can obtain a maximally-entangled cluster state via local operations and classical communication. Moreover, the protocol can be iterated to obtain a higher success probability and is feasible under the current experimental conditions.

关键词: cluster state, entanglement concentration, cross-Kerr nonlinearity

Abstract: We propose an entanglement concentration protocol (ECP) to concentrate an arbitrary partially-entangled four-photon cluster state. As a pioneering three-step entanglement concentration scheme, our protocol only needs single-photon resource to assist the concentration in each step, which makes this protocol more economical. With the help of the linear optical elements and weak cross-Kerr nonlinearity, one can obtain a maximally-entangled cluster state via local operations and classical communication. Moreover, the protocol can be iterated to obtain a higher success probability and is feasible under the current experimental conditions.

Key words: cluster state, entanglement concentration, cross-Kerr nonlinearity

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Hk (Quantum communication) 42.50.-p (Quantum optics)