钥匙(锁)
密钥生成
密钥分发
算法
量子
计算机科学
频道(广播)
量子密码学
统计物理学
作者
Cong Jiang,Zong-Wen Yu,Xiaolong Hu,Xiang-Bin Wang
出处
期刊:Physical Review A
[American Physical Society]
日期:2021-01-08
卷期号:103 (1): 012402-
被引量:6
标识
DOI:10.1103/physreva.103.012402
摘要
We propose a method named as double-scanning method to improve the key rate of measurement-device-independent quantum key distribution (MDI-QKD) drastically. In the method, two parameters are scanned simultaneously to tightly estimate the counts of single-photon pairs and the phase-flip error rate jointly. Numerical results show that the method in this work can improve the key rate by $35%--280%$ in a typical experimental setup. Besides, we study the optimization of MDI-QKD protocol with all parameters including the source parameters and failure probability parameters, over symmetric channel or asymmetric channel. Compared with the optimized results with only the source parameters, the all-parameter-optimization method could improve the key rate by about $10%$.
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