光学学报, 2019, 39 (2): 0227001, 网络出版: 2019-05-10
基于轨道角动量的循环差分相移量子密钥分发 下载: 787次
Round-Robin Differential Phase Shift Quantum Key Distribution Protocol Based on Orbital Angular Momentum
量子光学 量子密钥分发 轨道角动量 标记配对相干态 quantum optics quantum key distribution orbital angular momentum heralded pair-coherent source
摘要
提出了一种基于标记配对相干态(HPCS)和轨道角动量的循环差分相移量子密钥分发(RRDPS-QKD)方案,以光子轨道角动量作为信息载体,使用多种不同拓扑荷的轨道角动量的叠加态进行RRDPS-QKD的信息编码,显著提高了密钥生成率。使用HPCS作为量子光源,有效减小了空脉冲和多光子脉冲的比例,提高了密钥生成率。分析了光源在湍流大气信道中的传输特性,考虑了信道衰减和大气湍流对系统性能的影响。
Abstract
A round-robin differential phase shift quantum key distribution (RRDPS-QKD) protocol based on heralded pair-coherent source (HPCS) and orbital angular momentum is proposed. The superposition state consisting of multiple orbital angular momentum states with different topological charges is used as the information carriers to remarkably increase the key generation rate. HPCS is used as the quantum source to decrease the ratio of vacuum and multi-photon pulses and to dramatically increase the key generation rate. Moreover, the propagation characteristics in the turbulent atmosphere channel are analyzed, and the influence of both channel attenuation and atmospheric turbulence on the protocol is considered.
沈志冈, 王乐, 毛钱萍, 赵生妹. 基于轨道角动量的循环差分相移量子密钥分发[J]. 光学学报, 2019, 39(2): 0227001. Zhigang Shen, Le Wang, Qianping Mao, Shengmei Zhao. Round-Robin Differential Phase Shift Quantum Key Distribution Protocol Based on Orbital Angular Momentum[J]. Acta Optica Sinica, 2019, 39(2): 0227001.