›› 2014, Vol. 23 ›› Issue (11): 110304-110304.doi: 10.1088/1674-1056/23/11/110304

• GENERAL • 上一篇    下一篇

Promote entanglement trapping in photonic band gaps

韩伟a, 张英杰a b, 闫伟斌b, 夏云杰a   

  1. a Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China;
    b Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2014-02-19 修回日期:2014-05-13 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178012, 11247240, and 11304179), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant Nos. 20123705120002 and 20133705110001), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2012FQ024), the Youth Funds from Qufu Normal University, China (Grant No. XJ201219), and the Scientific Research Foundation of Qufu Normal University for Doctors, China (Grant No. BSQD20110132).

Promote entanglement trapping in photonic band gaps

Han Wei (韩伟)a, Zhang Ying-Jie (张英杰)a b, Yan Wei-Bin (闫伟斌)b, Xia Yun-Jie (夏云杰)a   

  1. a Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China;
    b Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-02-19 Revised:2014-05-13 Online:2014-11-15 Published:2014-11-15
  • Contact: Xia Yun-Jie E-mail:yjxia@mail.qfnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178012, 11247240, and 11304179), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant Nos. 20123705120002 and 20133705110001), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2012FQ024), the Youth Funds from Qufu Normal University, China (Grant No. XJ201219), and the Scientific Research Foundation of Qufu Normal University for Doctors, China (Grant No. BSQD20110132).

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摘要： We study the entanglement trapping of two entangled qubits, each of which is in its own photonic band gap, based on the weak measurement and quantum measurement reversal. An almost maximal entanglement of the two-qubit system can be trapped by using a certain weak measurement strength. Furthermore, we find that the optimal entanglement enhancing is not only dependent on the weak measurement strength but also on the different initial states. The outcomes in our scheme are completely different from that without any measurement on the studied system.

关键词: quantum information, entanglement trapping, weak measurement, quantum measurement reversal

Abstract: We study the entanglement trapping of two entangled qubits, each of which is in its own photonic band gap, based on the weak measurement and quantum measurement reversal. An almost maximal entanglement of the two-qubit system can be trapped by using a certain weak measurement strength. Furthermore, we find that the optimal entanglement enhancing is not only dependent on the weak measurement strength but also on the different initial states. The outcomes in our scheme are completely different from that without any measurement on the studied system.

Key words: quantum information, entanglement trapping, weak measurement, quantum measurement reversal

中图分类号:  (Foundations of quantum mechanics; measurement theory)

  • 03.65.Ta
03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)