摘要
在考虑衰减和去极化效应的情况下,根据电磁波传播与散射理论,建立了平流层量子通信系统地空路径上脉冲单光子源的传播模型;数值分析了大气环境对量子密钥分发的影响。结果表明:在晴空条件下,大气衰减对量子误码率的影响较大;而在降雨条件下,去极化效应对量子误码率的影响不容忽视。
Considering attenuation and depolarization effects on Earth space paths, a model for propagation of pulsed single photon source in stratospheric quantum communication system is obtained theoretically, based on theory of the electromagnetic wave propagation and scattering. By numerical analyzing the atmospheric environment on the quantum key distribution of a pulsed single photon propagating on Earth-space paths, it is shown that under clear sky atmospheric attenuation are obvious on quantum bit error rate, especially, under rainfall, depolarization effects on quantum bit error rate must also be considered.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第5期834-837,846,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(60572147,60672119)
关键词
平流层平台
量子通信
地空路径
去极化效应
量子误码率
stratospheric platform
quantum communication
Earth-space paths depolarization effect
quantum bit error rate
