摘要
针对标记配对相干态(HPCS)下量子密钥分配协议采用极化编码和相位编码带来基的依赖性问题,研究了基于HPCS和轨道角动量(OAM)的非对称信道测量设备无关的量子密钥分配协议。分析了该协议在不同距离比率下的平均光子数、误码率、密钥生成率与信道传输损耗的关系。在HPCS和OAM下,对比了对称信道和非对称信道测量设备无关的量子密钥协议的性能优劣。仿真结果表明:采用HPCS弥补了弱相干光源和标记单光子源的不足,大大减少真空脉冲并增加了单光子脉冲;随着信道传输损耗的增大,密钥生成率和安全传输距离逐渐减小,但非对称信道的性能仍优于对称信道的。
In order to solve the problem that the quantum key distribution protocol based on the heralded pair coherent state(HPCS) adopts polarization coding and phase coding to bring the basis dependence, a measurement device independent quantum key distribution protocol for asymmetric channels based on the HPCS and orbital angular momentum(OAM) is studied. The relationship among the mean photon number, bit error rate, key generation rate and channel transmission loss of the protocol at different distance ratios is analyzed. The performances of measurement device independent quantum key distribution protocols for symmetric and asymmetric channels with the HPCS and OAM are compared. The simulation results show that the use of the HPCS compensates for the lack of weak coherent source and heralded single photon source, greatly reducing the vacuum pulse and increasing the single photon pulse. As the channel transmission loss increases, the key generation rate and the secure transmission distance gradually decrease, but the performance of the asymmetric channel is still better than that of the symmetric channel.
作者
何业锋
杨红娟
王登
李东琪
宋畅
He Yefeng;Yang Hongjuan;Wang Deng;Li Dongqi;Song Chang(National Engineering Laboratory for Wireless Security, Xi' an University of Posts & Xi'an, Shaanxi 710121, China;School of Communication and Information Engineerbig, Xi'an University of Posts & Telecomm unications,Xi'an , Shaanxi 710121, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第4期356-362,共7页
Acta Optica Sinica
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
轨道角动量
量子密钥分配
测量设备无关
标记配对相干态
非对称信道
quantum optics
orbital angular momentum
quantum key distribution: measurement equipment in dependent
heralded pair coherent state
asymmetric channel
