自由空间量子密钥分发关键技术的研究进展  

Research Progress on Key Technologies of Free-Space Quantum Key Distributions

作　　者：杨汝 李云霞[1] 石磊[1] 蒙文[1] 罗均文 Yang Ru;Li Yunxia;Shi Lei;Meng Wen;Luo Junwen(Institute of Information and Navigation, Air Force Engineering University, Xi＇an, Shaanxi 710077, China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《激光与光电子学进展》2018年第2期22-29,共8页Laser & Optoelectronics Progress

摘　　要：自由空间的量子密钥分发(QKD)技术已成为量子通信领域的研究热点之一,连续变量QKD与离散变量QKD是其两大技术分支。介绍了近年来国内外自由空间QKD技术的研究进展,从实际应用角度出发,对比分析了两大分支主要的技术难点,重点分析了背景光干扰、大气信道中单光子的退偏振特性以及湍流引起的相位畸变等现象,并对自由空间QKD技术的发展前景进行了展望。The free-space quantum key distribution （QKD） technology has become one of the research hotspots in the field of quantum communications, and the continuous variable QKD and the discrete variable QKD are two major technical branches of this technology. The recent research progresses of free space QKD technology at home and abroad are reviewed. From the viewpoint of practical applications, the technical difficulties of these two branches are compared and analyzed. The phenomena like the background light interference, the single photon depolarization characteristics in the atmospheric channel and the phase distortion caused by turbulence are analyzed emphatically, and the development foreground of free space QKD technology is prospected.

关 键 词：量子光学 自由空间量子密钥分发 连续变量 离散变量 背景光 退偏振特性 相位畸变 

分 类 号：O431.2[机械工程—光学工程]