Improving the performance of practical phase-matching quantum key distribution with advantage distillation

被引:2
作者
Wang, Zhe [1 ,2 ]
Zhang, Chun-Mei [1 ,2 ]
Li, Hong-Wei [3 ]
机构
[1] Nanjing Univ Posts & Telecommun, Inst Quantum Informat & Technol, Nanjing 210003, Peoples R China
[2] State Key Lab Cryptol, POB 5159, Beijing 100878, Peoples R China
[3] SSF IEU, Henan Key Lab Quantum Informat & Cryptog, Zhengzhou 450000, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Phase-matching; Quantum key distribution; Advantage distillation; Decoy-state;
D O I
10.1007/s11128-024-04337-6
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Phase-matching quantum key distribution (PM-QKD) is a promising protocol that can surpass the linear key-rate bound. Generally, inserting an advantage distillation (AD) step into PM-QKD can improve the secure key rate and transmission distance significantly in the asymptotic case. Here, we investigate the performance of practical PM-QKD systems with AD in the non-asymptotic case. Simulation results show that AD can dramatically improve the performance of practical PM-QKD systems. Moreover, we propose to estimate the information leakage using three mutually unbiased bases, namely X, Y and Z, to further enhance its performance, which demonstrates that using the error rates in X, Y and Z bases to estimate the information leakage can improve the secure key rate at high channel losses and misalignment errors.
引用
收藏
页数:12
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