量子电子学报2025，Vol.42Issue(6)：829-839,11.DOI:10.3969/j.issn.1007-5461.2025.06.010
模式匹配量子密钥分发协议中的新型光源监测方案
A novel light source monitoring scheme for mode-pairing quantum key distribution protocol
摘要
Abstract
Mode-pairing quantum key distribution(MP-QKD)can break through the linear bound of secure key rates under repeaterless conditions without phase locking.However,most existing MP-QKD protocols assume that the photon number distribution is known and the light source is reliable,which is difficult to fulfill in practical implementations.To overcome this issue,a novel photon number distribution monitoring scheme,referred to as novel light source monitoring(NLSM),is proposed in this work.This scheme adopts a passive structure to monitor the light source,thereby eliminating the modulation errors introduced by active components in traditional monitoring techniques.Simulation results indicate that the implementation of NLSM scheme has minimal impact on the secure key rate and achieves transmission performance comparable to the ideal scenario.Moreover,compared with the existing active monitoring schemes,NLSM scheme demonstrates stronger robustness and stability under practical conditions,such as modulation inaccuracies and light source fluctuations.These advantages make NLSM scheme a promising solution for improving the security and practicality of MP-QKD systems under actual light source conditions,providing essential support for large-scale deployment of MP-QKD systems.关键词
量子通信/量子密钥分发/模式匹配/光源监测/光子数分布Key words
quantum communication/quantum key distribution/mode-pairing/light source monitoring/photon number distribution分类
物理学引用本文复制引用
李振华,窦天琦,孔维文,解宇恒,赵琦,唐建军,马海强..模式匹配量子密钥分发协议中的新型光源监测方案[J].量子电子学报,2025,42(6):829-839,11.基金项目
科技创新2030—"量子通信与量子计算机"中"面向运营商云网业务的融合量子密钥分发的密码系统研究和应用示范"(2021ZD0301300) （2021ZD0301300）
