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.
作者
杨汝
李云霞
石磊
蒙文
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)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第2期22-29,共8页
Laser & Optoelectronics Progress
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
quantum optics
free-space quantum key distribution
continuous variables
discrete variables
background light
depolarization characteristics
phase distortion
