中国物理B ›› 2013, Vol. 22 ›› Issue (2): 20307-020307.doi: 10.1088/1674-1056/22/2/020307

• GENERAL • 上一篇    下一篇

Optimal entanglement concentration for three-photon W states with parity check measurement

周澜a b, 盛宇波b c, 赵生妹b c   

  1. a College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    b Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China;
    c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:2012-08-09 修回日期:2012-09-24 出版日期:2013-01-01 发布日期:2013-01-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11104159 and 61271238); the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (Grant No. NY211008); the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, the Open Research Fund Program of National Laboratory of Solid State Microstructures, Nanjing University, (Grant Nos. M25020 and M25022); the University Natural Science Research Foundation of Jiangsu Province (Grant No. 11KJA510002); the Open Research Fund of the Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, China, and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Optimal entanglement concentration for three-photon W states with parity check measurement

Zhou Lan (周澜)a b, Sheng Yu-Bo (盛宇波)b c, Zhao Sheng-Mei (赵生妹)b c   

  1. a College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    b Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China;
    c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2012-08-09 Revised:2012-09-24 Online:2013-01-01 Published:2013-01-01
  • Contact: Sheng Yu-Bo E-mail:shengyb@njupt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11104159 and 61271238); the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (Grant No. NY211008); the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, the Open Research Fund Program of National Laboratory of Solid State Microstructures, Nanjing University, (Grant Nos. M25020 and M25022); the University Natural Science Research Foundation of Jiangsu Province (Grant No. 11KJA510002); the Open Research Fund of the Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, China, and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘要: We present an efficient entanglement concentration protocol (ECP) for the less-entangled W state with some same conventional polarized single photons. In the protocol, two of the parties say Alice and Charlie should perform the parity check measurements and they can ultimately obtain the maximally entangled W state with a certain success probability. Otherwise, they can obtain another less-entangled W state, which can be reconcentrated into the maximally entangled W state. By iterating this ECP, a high success probability can be achieved. This ECP may be an optimal one and it is useful in current quantum information processing.

关键词: quantum communication, entanglement, entanglement concentration

Abstract: We present an efficient entanglement concentration protocol (ECP) for the less-entangled W state with some same conventional polarized single photons. In the protocol, two of the parties say Alice and Charlie should perform the parity check measurements and they can ultimately obtain the maximally entangled W state with a certain success probability. Otherwise, they can obtain another less-entangled W state, which can be reconcentrated into the maximally entangled W state. By iterating this ECP, a high success probability can be achieved. This ECP may be an optimal one and it is useful in current quantum information processing.

Key words: quantum communication, entanglement, entanglement concentration

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
03.67.Hk (Quantum communication) 03.65.Ud (Entanglement and quantum nonlocality)