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不同天气条件对自由空间量子通信系统性能的影响

Influences of Different Weather Conditions on Performance of Free-Space Quantum Communication System

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摘要

研究了三种常见天气降雨、降雪和雾霾对采用不同波长信号的自由空间量子通信系统的安全密钥率的影响。利用建立的基于连续变量高斯调制的量子密钥分发传输模型,分析了在个体攻击和集体攻击情况下Bob分别采用零差检测和外差检测时,不同天气条件和不同信号光波长对安全密钥率的影响。随后仿真得到了不同天气情况和等级、不同波长量子信号、不同攻击类型和不同检测方式条件下安全密钥率随传输距离的变化关系,并对结果进行了分析。研究结果可以为实际的自由空间量子通信系统的设计提供一定的参考。

Abstract

This paper investigates the effects of three weather conditions, such as rain, snow, and haze, on security key rate of a free-space quantum communication system using different signal wavelengths. For the cases of collective and individual attacks, analysis is conducted on why and how different weather conditions and signal wavelengths affect the security key rate based on a continuous-variable quantum key distribution model with Gaussian modulation. In the analysis, two different conditions are considered: one in which Bob uses a homodyne detector and the other in which a heterodyne detector is used. The relationship between the security key rate and transmission distance is simulated under various conditions, including different weather conditions and levels, different quantum signal wavelengths, different attack types, and different detection modes. The results of this paper can serve as an instructive reference for future practical free-space quantum communication system designs.

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中图分类号:TN911

DOI:10.3788/AOS202040.0227001

所属栏目:量子光学

基金项目:国家自然科学基金、中央高校基本科研业务费专项资金;

收稿日期:2019-08-01

修改稿日期:2019-09-09

网络出版日期:2020-02-01

作者单位    点击查看

刘涛:华北电力大学电子与通信工程系, 河北 保定 071003北京邮电大学信息光子学与光通信研究院, 北京 100876
朱聪:华北电力大学电子与通信工程系, 河北 保定 071003
孙春阳:华北电力大学电子与通信工程系, 河北 保定 071003
房新新:华北电力大学电子与通信工程系, 河北 保定 071003
王平平:华北电力大学电子与通信工程系, 河北 保定 071003

联系人作者:刘涛(taoliu@ncepu.edu.cn)

备注:国家自然科学基金、中央高校基本科研业务费专项资金;

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引用该论文

Liu Tao,Zhu Cong,Sun Chunyang,Fang Xinxin,Wang Pingping. Influences of Different Weather Conditions on Performance of Free-Space Quantum Communication System[J]. Acta Optica Sinica, 2020, 40(2): 0227001

刘涛,朱聪,孙春阳,房新新,王平平. 不同天气条件对自由空间量子通信系统性能的影响[J]. 光学学报, 2020, 40(2): 0227001

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