Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection

doi:10.11930/j.issn.1004-9649.201811052

Electric Power ›› 2019, Vol. 52 ›› Issue (7): 6-10.DOI: 10.11930/j.issn.1004-9649.201811052

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Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection

YU Hao¹, FENG Bao^2,3, PAN Zichun¹, ZHUO Wenhe¹, LI Zhenwei¹

1. Information and Communication Branch of State Grid Anhui Electric Power Co., Ltd., Hefei 230061, China;
2. NARI Group Corporation/State Grid Electric Power Research Institute, Nanjing 211106, China;
3. NRGD Quantum Technology Co., Ltd., Nanjing 211106, China

Received:2018-11-15 Revised:2019-06-08 Online:2019-07-05 Published:2019-07-13
Supported by:
This work is supported by State Grid Anhui Electric Power Co., Ltd. 2018 Innovation Project (Research on Anhui Electric Power Quantum Key Distribution Basic Network for Full Service Security Enhancement, No.B1120718003P).

Abstract

Abstract: Compared with discrete-variable quantum key distribution (DVQKD) protocol that has been widely used in power system, the continuous-variable quantum key distribution (CVQKD), which uses continuous variables to perform QKD protocol, has such advantages as simple equipment, high detection efficiency and good compatibility, and has attracted wide attentions. However, the attenuation in the quantum state transmission heavily reduces the propagation distance of CVQKD. In the paper, we present a CVQKD protocol based on post-selection method, which need not any extra single photon source. The results show that the higher probability values are all reserved and amplified by the post selection window function. The proposed method can simplify the implementation of CVQKD and reduce its cost, and can also provide ideas for studying the quantum secure communication schemes in power network.

Key words: continuous-variable, quantum key distribution protocol, noiseless linear amplification, window function, quantum communication

CLC Number:

TM73
TN929.1

YU Hao, FENG Bao, PAN Zichun, ZHUO Wenhe, LI Zhenwei. Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection[J]. Electric Power, 2019, 52(7): 6-10.

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Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection

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