2020/07/31 by Cong Jiang, Zong-Wen Yu, Zong‐Wen Yu +4 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #Algorithm #Channel (broadcasting) #Computer science #Electronic engineering #Engineering #Joint (building) #Key (lock) #Optics #Phase (matter) #Photon #Physics #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum key distribution #Set (abstract data type) #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.103.012402
published as Phys. Rev. A 103, 012402 (2021)
openalex publication_date 2021/01/08 · arxiv created 2021/01/13 · arxiv updated 2021/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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%.