Performance of phase-matching quantum key distribution based on wavelength division multiplexing technology  

作　　者：马海强 韩雁鑫 窦天琦 李鹏云 Haiqiang Ma;Yanxin Han;Tianqi Dou;Pengyun Li(School of Science and State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China;China Telecom Research Institute,Beijing 102209,China;China Academy of Electronics and Information Technology,China Electronic Technology Group Corporation,Beijing 100041,China)

机构地区：[1]School of Science and State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]China Telecom Research Institute,Beijing 102209,China [3]China Academy of Electronics and Information Technology,China Electronic Technology Group Corporation,Beijing 100041,China

出　　处：《Chinese Physics B》2023年第2期103-107,共5页中国物理B（英文版）

基　　金：supported by the State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications) (Grant No. IPOC2021ZT10);the National Natural Science Foundation of China (Grant No. 11904333);the Fundamental Research Funds for the Central Universities (Grant No. 2019XDA02);BUPT Innovation and Entrepreneurship Support Program (Grant No. 2022-YC-T051)。

摘　　要：Quantum key distribution(QKD) generates information-theoretical secure keys between two parties based on the physical laws of quantum mechanics. The phase-matching(PM) QKD protocol allows the key rate to break the quantum channel secret key capacity limit without quantum repeaters, and the security of the protocol is demonstrated by using equivalent entanglement. In this paper, the wavelength division multiplexing(WDM) technique is applied to the PM-QKD protocol considering the effect of crosstalk noise on the secret key rate. The performance of PM-QKD protocol based on WDM with the influence of adjacent classical channels and Raman scattering is analyzed by numerical simulations to maximize the total secret key rate of the QKD, providing a reference for future implementations of QKD based on WDM techniques.

关 键 词：quantum key distribution wavelength division multiplexing secret key rate 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理]