中国物理B ›› 2013, Vol. 22 ›› Issue (9): 90309-090309.doi: 10.1088/1674-1056/22/9/090309

• GENERAL • 上一篇    下一篇

Complete four-photon cluster-state analyzer based on cross-Kerr nonlinearity

王志会a, 朱龙a, 苏石磊a, 郭奇b, 程留永b, 朱爱东a, 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
  • 收稿日期:2012-12-25 修回日期:2013-04-17 出版日期:2013-07-26 发布日期:2013-07-26
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60667001 and 11165015).

Complete four-photon cluster-state analyzer based on cross-Kerr nonlinearity

Wang Zhi-Hui (王志会)a, Zhu Long (朱龙)a, Su Shi-Lei (苏石磊)a, Guo Qi (郭奇)b, Cheng Liu-Yong (程留永)b, Zhu Ai-Dong (朱爱东)a, 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
  • Received:2012-12-25 Revised:2013-04-17 Online:2013-07-26 Published:2013-07-26
  • Contact: Zhang Shou E-mail:szhang@ybu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60667001 and 11165015).

摘要: We propose a method to construct an optical cluster-state analyzer based on cross-Kerr nonlinearity combined with linear optics elements. In the scheme, we employ two four-qubit parity gates and the controlled phase gate (CPG) from only the cross-Kerr nonlinearity and show that all the orthogonal four-qubit cluster states can be completely identified. The scheme is significant for the large-scale quantum communication and quantum information processing networks. In addition, the scheme is feasible and deterministic under current experimental conditions.

关键词: cluster-state analyzer, quantum information, parity gate, cross-Kerr nonlinearity

Abstract: We propose a method to construct an optical cluster-state analyzer based on cross-Kerr nonlinearity combined with linear optics elements. In the scheme, we employ two four-qubit parity gates and the controlled phase gate (CPG) from only the cross-Kerr nonlinearity and show that all the orthogonal four-qubit cluster states can be completely identified. The scheme is significant for the large-scale quantum communication and quantum information processing networks. In addition, the scheme is feasible and deterministic under current experimental conditions.

Key words: cluster-state analyzer, quantum information, parity gate, cross-Kerr nonlinearity

中图分类号:  (Quantum information)

  • 03.67.-a
42.50.Ex (Optical implementations of quantum information processing and transfer) 42.65.-k (Nonlinear optics)