基于弱相干态光源的相位匹配诱骗态量子密钥分配方案

量子电子学报 ›› 2021, Vol. 38 ›› Issue (1): 37-44.

基于弱相干态光源的相位匹配诱骗态量子密钥分配方案

虞味, 周媛媛, 周学军

海军工程大学电子工程学院, 湖北武汉430033

收稿日期:2020-05-15 修回日期:2020-06-22 出版日期:2021-01-28 发布日期:2021-02-01
通讯作者: E-mail: zyy−hjgc@aliyun.com E-mail:zyy_hjgc@aliyun.com
作者简介:虞味( 1996 - ), 湖南桃源人, 研究生, 主要从事量子保密通信方面的研究。E-mail: 754093499@qq.com

Phase-matching decoy-state quantum key distribution scheme with weak coherent source

YU Wei, ZHOU Yuanyuan, ZHOU Xuejun

College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China

Received:2020-05-15 Revised:2020-06-22 Published:2021-01-28 Online:2021-02-01
Contact: Yuan yuanZhou E-mail:zyy_hjgc@aliyun.com

摘要/Abstract

摘要： 基于弱相干态光源, 提出了一种相位匹配三诱骗态量子密钥分配方案, 对相关计数率和误码率进行了估计, 并采用切诺夫界的统计分析方法对该方案在有限数据长度条件下的传输性能进行了分析。仿真结果表明: 相位匹配三诱骗态量子密钥分配方案最大安全传输距离可达521 km, 趋近于无穷诱骗态相位匹配协议的理论极限值 536 km; 随着数据长度的下降, 方案传输性能有所下降, 但是即使数据长度下降至107, 其最大安全传输距离仍然可达502 km。

关键词: 量子信息, 量子密钥分配, 相位匹配协议, 诱骗态, 有限数据长度

Abstract: A method of phase-matching three-decoy-state quantum key distribution is proposed with a weak coherent state source. The relevant parameters such as count rate and bit error rate are estimated, and the statistical analysis method of Chernoff bound is used to analyze the transmission performance of the method under the condition of finite data length. The simulation results show that the maximum secure transmission distance of the phase-matching three-decoy-state quantum key distribution scheme can reach 521 km, which is very close to the theoretical limit of the phase-matching infinite-decoy-state protocol of 536 km. As the data length decreases, the transmission performance of the scheme is declined. Even if the data length drops to 107, its maximum secure transmission distance can still reach 502 km.

Key words: quantum information, quantum key distribution, phase-matching protocol, decoy state, finite data length

中图分类号:

O431.2

虞味周媛媛周学军. 基于弱相干态光源的相位匹配诱骗态量子密钥分配方案[J]. 量子电子学报, 2021, 38(1): 37-44.

YU Wei, ZHOU Yuanyuan, ZHOU Xuejun. Phase-matching decoy-state quantum key distribution scheme with weak coherent source[J]. Chinese Journal of Quantum Electronics, 2021, 38(1): 37-44.

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