海盐粒子半径对大气连续变量量子密钥分配的影响

Effects of Sea Salt Radius on Continuous-Variable Quantum Key Distribution

为研究悬浮在大气中的高浓度海盐对大气CVQKD的影响,基于Mie散射理论建立岸基—海洋大气CVQKD模型,并研究海盐粒子半径和传输距离对岸基—海洋大气CVQKD协议性能的影响。仿真结果表明,密钥率随着粒子半径的增大呈下降趋势。另外,无论是在固定岸基到海面的传输距离下逐渐增加海洋传输距离的情况,还是固定海洋传输距离而逐渐增加岸基传输距离的情况,密钥率都随之降低。研究结果为建立实际的岸基—海洋大气CVQKD模型提供依据,为评估海洋大气CVQKD协议性能提供支撑。根据海面上空海盐参数,调整大气CVQKD系统的各项参数,可以提高通信的可靠性。

In order to investigate the effect of highconcentratsea salt suspended in the atmosphere on atmospheric CVQKD,a shore-based-reef atmospheric CVQKD is established based on Mie scattering theory.The effects on performance of shore-based-reef atmospheric CVQKDare researched as well.imulation show that the secret key rate declines with the increase of particle radius.Besides,whether the transmission distance of sea surface is gradually increased for the fixed transmission distance,or the transmission distance is gradually increased when the distance of sea surface is fixed,the secret key rate decreases.This paper provides a basis for the establishment of practical shore-based-reef atmospheric CVQKD model,which conduce to performance of shore-based-reef atmospheric CVQKD.Furthermore,the reliability of communication can be improved by adjusting the parameters of atmospheric CVQKD system.