有限探测死时间的高速测量设备无关-量子密钥分配  

High speed measurement device independent quantum key distribution with finite detector dead time

作　　者：姬一鸣 庄茂录 张贵新 陈爱萍 王丽 李文强 Ji Yiming;Zhuang Maolu;Zhang Guixin;Chen Aiping;Wang Li;Li Wenqiang(Air Force Communication NCO Academy,Dalian 116600,China)

机构地区：[1]空军通信士官学校,辽宁大连116600

出　　处：《红外与激光工程》2018年第A01期55-59,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金（61106068）

摘　　要：由于探测器死时间的影响，当信号发送速率超过探测器的最大计数率时，将导致光子到达时不能成功进行探测，造成较高的误码率，影响密钥的安全。文中以BB84协议为例，分析了有限探测死时间的高速测量设备无关一量子密钥分配方案的安全性，并对最优传输速率进行了仿真。仿真结果表明：不考虑探测器死时间时，密钥筛选速率随着光子发送速率的增加而线性增加；考虑探测器死时间影响时，密钥筛选速率不再随着光子传输速率的增加而无限增加，筛选密钥曲线发生弯曲。在传输距离为100km时。密钥的筛选速率和探测器死时间的关系接近2．1／10τ，最优传输速率与探测器死时间的关系接近3．3×10／τ。The detector cannot detect photon successfully when the signal transmission rate exceeds the maximum detector count rate in high speed quantum key distribution scheme. This leads to correlations in the sifted bit string, and the security is compromised. In this paper, the high speed measurement device independent quantum key distribution based on BB84 protocol with finite detector dead time was analyed and the optimal transmission speed was simulated. Simulation result shows that the sifted key rate raised linearly with the increase of photon transmission rate without consideration of the influence of detector＇s dead time; with consideration of the influence of detector＇s dead time, the sifted key rate is no longer raising with the photon transmission rate infinitely and the curve of sifted key rate is distorted. When the transmission distance is 100 km, the correlation between the sifted key rate and detector dead time is approximate to 2.1/10τ, and the correlation between optimal transmission rate and detector dead time is approximate to 3.3×105/τ.

关 键 词：量子密钥分发 单光子探测 测量设备无关 探测器死时间 BB84协议 

分 类 号：TN913.7[电子电信—通信与信息系统]