Practical decoy-state BB84 quantum key distribution with quantum memory

作     者：Xian-Ke Li Xiao-Qian Song Qi-Wei Guo Xing-Yu Zhou Qin Wang 李咸柯;宋小谦;郭其伟;周星宇;王琴

作者机构：Institute of Quantum Information and TechnologyNanjing University of Posts and TelecommunicationsNanjing 210003China Broadband Wireless Communication and Sensor Network TechnologyKey Laboratory of Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China Telecommunication and Networks National Engineering Research CenterNanjing University of Posts and TelecommunicationsNanjing 210003China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第6期

页      面：133-136页

核心收录：

学科分类：11[军事学] 1105[军事学-军队指挥学] 07[理学] 0839[工学-网络空间安全] 08[工学] 070201[理学-理论物理] 110505[军事学-密码学] 110503[军事学-军事通信学] 0702[理学-物理学] 

基　　金：supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306400 and 2017YFA0304100) the National Natural Science Foundation of China (Grant Nos. 12074194 and 11774180) the Leading-edge Technology Program of Jiangsu Provincial Natural Science Foundation,China (Grant No. BK20192001) 

主　　题：quantum key distribution quantum communication quantum memory decoy state 

摘      要：We generalize BB84 quantum key distribution(QKD) to the scenario where the receiver adopts a heralded quantum memory(QM). With the heralded QM, the valid dark count rate of the receiver s single photon detectors can be mitigated obviously, which will lower the quantum bit error rate, and thus improve the performance of decoy-state BB84 QKD systems in long distance range. Simulation results show that, with practical experimental system parameters, decoy-state BB84 QKD with QM can exhibit performance comparable to that of without QM in short distance range, and exhibit performance better than that without QM in long distance range.