| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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 |
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 |
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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.
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Received: 29 April 2014
Revised: 30 May 2014
Accepted manuscript online:
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PACS:
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42.50.Ex
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(Optical implementations of quantum information processing and transfer)
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| Fund: 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). |
Corresponding Authors:
Wang Shuang, Yin Zhen-Qiang
E-mail: wshuang@ustc.edu.cn;yinzheqi@mail.ustc.edu.cn
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Cite this article:
Li Fang-Yi (李芳毅), Wang Dong (王东), Wang Shuang (王双), Li Mo (李默), Yin Zhen-Qiang (银振强), Li Hong-Wei (李宏伟), Chen Wei (陈巍), Han Zheng-Fu (韩正甫) Effect of electromagnetic disturbance on thepractical QKD system in the smart grid 2014 Chin. Phys. B 23 124201
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