法拉第镜不完善对连续变量量子密钥分发系统的影响(英文)  

The Influence of Faraday Mirror′s Imperfection in Continuous Variable Quantum Key Distribution System

作　　者：杨荣桓 何广强[1] 

机构地区：[1]上海交通大学电子工程系,区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《光子学报》2015年第2期185-189,共5页Acta Photonica Sinica

基　　金：The National Natural Science Foundation of China(No.61102053)

摘　　要：采用连续变量量子密钥分发的纠缠模型,在反向协商情况下,研究法拉第镜不完善对系统安全密钥速率的影响.结果表明,不完善的法拉第镜会降低系统实际的密钥速率,并且降低安全通信距离,且随着法拉第镜失偏角度的增大而增大.此外,使用大的调制方差,可以降低法拉第镜不完善对系统的影响.The influence of imperfect Faraday mirror on secret key rate of continuous variable quantum key distribution system in reverse reconciliation is considered with theoretical analysis and numerical simulation.It takes entanglement based scheme.It′s found that Faraday mirror′s imperfection reduces the secret key rate and transmission distance of system.The impact increases if the imperfection turns more serious.Besides it finds using great modulation variance can reduce the impact of Faraday mirror significantly.

关 键 词：量子通信 量子光学 量子理论计算机仿真 量子密码 量子理论计算 

分 类 号：TN913.7[电子电信—通信与信息系统] TN918[电子电信—信息与通信工程]