摘要
提出一种基于指示单光子源和量子存储的量子密钥分配方案。分析了其密钥生成率与安全传输距离和量子存储时间的关系,以及量子存储的退相干效应对最终密钥生成率的影响。研究了量子存储对基于指示单光子源的测量设备无关量子密钥分配方案的影响。仿真结果表明,在指示单光子源下,量子存储的实际相干时间增加,使得系统的安全传输距离增大,且量子退相干效应对最终的密钥生成率的影响微弱。
A quantum key distribution scheme based on heralded single photon sources and quantum memory is studied.The relationship between key generation rate and safe transmission distance and storage time is analyzed,and the effect of decoherence effect of quantum memory on the final key generation rate is analyzed.The influence of quantum memory on measurement-device-independent quantum key distribution scheme based on heralded single photon sources is studied.The simulation results show that under heralded single photon sources,the increase of the actual coherence time of the quantum memory makes the safe transmission distance of the system increase,and the quantum decoherence effect has a weak influence on the final key generation rate.
作者
何业锋
王登
杨红娟
宋畅
李东琪
He Yefeng;Wang Deng;Yang Hongjuan;Song Chang;Li Dongqi(National Engineering Laboratory for Wireless Security,Xi′an University of Posts and Telecommunications,Xi'an,Shaanxi 710121,China;School of Communication and Information Engineering,Xi′an University of Posts and Telecommunications,Xi'an,Shaanxi 710121,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第4期301-306,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(61802302
61472472
61772418)
陕西省自然科学基础研究计划(2017JM6037)
关键词
量子光学
量子密钥分配
测量设备无关
指示单光子源
量子存储
quantum optics
quantum key distribution
measurement-device-independent
heralded single photon sources
quantum memory
