Improved reference-frame-independent quantum key distribution with intensity fluctuations  

作　　者：Zi-Qi Chen Hao-Bing Sun Ming-Shuo Sun Qin Wang 陈子骐;孙昊冰;孙铭烁;王琴

机构地区：[1]Institute of Quantum Information and Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China [2]Broadband Wireless Communication and Sensor Network Technology,Key Laboratory of Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

出　　处：《Chinese Physics B》2025年第2期48-52,共5页中国物理B(英文版)

基　　金：financial support from the Industrial Prospect and Key Core Technology Projects of Jiangsu Provincial Key R&D Program (Grant No. BE2022071);the Natural Science Foundation of Jiangsu Province (Grant No. BK20192001);the National Natural Science Foundation of China (Grant No. 12074194);the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX220954)。

摘　　要：Reference-frame-independent quantum key distribution(RFI-QKD) can avoid real-time calibration operation of reference frames and improve the efficiency of the communication process. However, due to imperfections of optical devices,there will inevitably exist intensity fluctuations in the source side of the QKD system, which will affect the final secure key rate. To reduce the influence of intensity fluctuations, an improved 3-intensity RFI-QKD scheme is proposed in this paper.After considering statistical fluctuations and implementing global parameter optimization, we conduct corresponding simulation analysis. The results show that our present work can present both higher key rate and a farther transmission distance than the standard method.

关 键 词：quantum key distribution intensity fluctuations decoy-state method 

分 类 号：TN9[电子电信—信息与通信工程]