中国物理B ›› 2014, Vol. 23 ›› Issue (12): 124201-124201.doi: 10.1088/1674-1056/23/12/124201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Effect of electromagnetic disturbance on thepractical QKD system in the smart grid

李芳毅a b, 王东a b, 王双a b, 李默a b, 银振强a b, 李宏伟a b, 陈巍a b, 韩正甫a b   

  1. a Key Laboratory of Quantum Information, University of Science and Technology of China,Chinese Academy of Sciences, Hefei 230026, China;
    b Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2014-04-29 修回日期:2014-05-30 出版日期:2014-12-15 发布日期:2014-12-15
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61101137, 61201239, 61205118, and 11304397) and the National Basic Research Program of China (Grants No. 2013CB338002).

Effect of electromagnetic disturbance on thepractical QKD system in the smart grid

Li Fang-Yi (李芳毅)a b, Wang Dong (王东)a b, Wang Shuang (王双)a b, Li Mo (李默)a b, Yin Zhen-Qiang (银振强)a b, Li Hong-Wei (李宏伟)a b, Chen Wei (陈巍)a b, Han Zheng-Fu (韩正甫)a b   

  1. a Key Laboratory of Quantum Information, University of Science and Technology of China,Chinese Academy of Sciences, Hefei 230026, China;
    b Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2014-04-29 Revised:2014-05-30 Online:2014-12-15 Published:2014-12-15
  • Contact: Wang Shuang, Yin Zhen-Qiang E-mail:wshuang@ustc.edu.cn;yinzheqi@mail.ustc.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61101137, 61201239, 61205118, and 11304397) and the National Basic Research Program of China (Grants No. 2013CB338002).

摘要:

To improve the security of the smart grid, quantum key distribution (QKD) is an excellent choice. The rapid fluctuations on the power aerial optical cable and electromagnetic disturbance in substations are two main challenges for implementation of QKD. Due to insensitivity to birefringence of the channel, the stable phase-coding Faraday–Michelson QKD system is very practical in the smart grid. However, the electromagnetic disturbance in substations on this practical QKD system should be considered. The disturbance might change the rotation angle of the Faraday mirror, and would introduce an additional quantum bit error rate (QBER). We derive the new fringe visibility of the system and the additional QBER from the electromagnetic disturbance. In the worst case, the average additional QBER only increases about 0.17% due to the disturbance, which is relatively small to normal QBER values. We also find the way to degrade the electromagnetic disturbance on the QKD system.

关键词: Faraday mirror, electromagnetic disturbance, quantum key distribution, quantum bit error rate, smart grid

Abstract:

To improve the security of the smart grid, quantum key distribution (QKD) is an excellent choice. The rapid fluctuations on the power aerial optical cable and electromagnetic disturbance in substations are two main challenges for implementation of QKD. Due to insensitivity to birefringence of the channel, the stable phase-coding Faraday–Michelson QKD system is very practical in the smart grid. However, the electromagnetic disturbance in substations on this practical QKD system should be considered. The disturbance might change the rotation angle of the Faraday mirror, and would introduce an additional quantum bit error rate (QBER). We derive the new fringe visibility of the system and the additional QBER from the electromagnetic disturbance. In the worst case, the average additional QBER only increases about 0.17% due to the disturbance, which is relatively small to normal QBER values. We also find the way to degrade the electromagnetic disturbance on the QKD system.

Key words: Faraday mirror, electromagnetic disturbance, quantum key distribution, quantum bit error rate, smart grid

中图分类号:  (Optical implementations of quantum information processing and transfer)

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