Passive Decoy-State Reference-Frame-Independent Quantum Key Distribution with Heralded Single-Photon Source  

作　　者：李家骥 汪洋 李宏伟 彭朋 周淳 江木生 马鸿鑫 冯林溪 鲍皖苏 

机构地区：[1]Henan Key Laboratory of Quantum Information and Cryptography, Zhengzhou Information Science and Technology Institute [2]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China

出　　处：《Chinese Physics Letters》2017年第12期1-5,共5页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2013CB338002;the National Natural Science Foundation of China under Grant Nos 61505261,61675235,61605248 and 11304397

摘　　要：Reference-frame-independent（RFI）quantum key distribution（QKD）is a protocol which can share unconditional secret keys between two remote users without the alignment of slowly varying reference frames.We propose a passive decoy-state RFI-QKD protocol with heralded single-photon source（HSPS）and present its security analysis.Compared with RFI QKD using a weak coherent pulse source（WCPS）,numerical simulations show that the passive decoy-state RFI QKD with HSPS performs better not only in secret key rate but also in secure transmission distance.Moreover,our protocol is robust against the relative motion of the reference frames as well as RFI QKD with the WCPS.In addition,we also exploit Hoeffding＇s inequality to investigate the finite-key effect on the security of the protocol.Reference-frame-independent（RFI）quantum key distribution（QKD）is a protocol which can share unconditional secret keys between two remote users without the alignment of slowly varying reference frames.We propose a passive decoy-state RFI-QKD protocol with heralded single-photon source（HSPS）and present its security analysis.Compared with RFI QKD using a weak coherent pulse source（WCPS）,numerical simulations show that the passive decoy-state RFI QKD with HSPS performs better not only in secret key rate but also in secure transmission distance.Moreover,our protocol is robust against the relative motion of the reference frames as well as RFI QKD with the WCPS.In addition,we also exploit Hoeffding＇s inequality to investigate the finite-key effect on the security of the protocol.

关 键 词：QKD Passive Decoy-State Reference-Frame-Independent Quantum Key Distribution with Heralded Single-Photon Source RFI 

分 类 号：O413[理学—理论物理] TN918[理学—物理]