Continuous-Variable Measurement-Device-Independent Quantum Key Distribution with One-Time Shot-Noise Unit Calibration

作     者：黄露雨 张一辰 喻松 Luyu Huang;Yichen Zhang;Song Yu

作者机构：State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2021年第38卷第4期

页      面：1-6页

核心收录：

学科分类：07[理学] 08[工学] 0839[工学-网络空间安全] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China (Grant Nos.61531003 and 62001044) the Fundamental Research Funds for the Central Universities of China。 

主　　题：realization Independent eliminate 

摘      要：Imperfections in practical detectors,including limited detection efficiency,and inherent electronic noise,can seriously decrease the transmission distance of continuous-variable measurement-device-independent quantum key distribution systems.Owing to the difficulties inherent in realizing a high-efficiency fiber homodyne detector,challenges still exist in continuous-variable measurement-device-independent quantum key distribution system implementation.We offer an alternative approach in an attempt to solve these difficulties and improve the potential for system implementation.Here,a novel practical detector modeling method is utilized,which is combined with a one-time shot-noise-unit calibration method for the purpose of system realization.The new modeling method benefits greatly from taking advantage of one-time shot-noise-unit calibration methods,such as measuring electronic noise and shot noise directly to a novel shot-noise unit,so as to eliminate the statistical fluctuations found in previous methods;this makes the implementation of such systems simpler,and the calibration progress more accurate.We provide a simulation of the secret key rate versus distance with different parameters.In addition,the minimal detection efficiency required at each distance,as well as the contrast between the two methods,are also shown,so as to provide a reference in terms of system realization.