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Quantum Cryptography Security

Higher key rate of measurement-device-independent quantum key distribution through joint data processing

arXiv
Authors: Cong Jiang, Zong-Wen Yu, Xiao-Long Hu, Xiang-Bin Wang

Year

2020

Paper ID

22159

Status

Preprint

Abstract Read

~2 min

Abstract Words

108

Citations

N/A

Abstract

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 set-up. 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\%.

Why This Paper Matters

  • This paper contributes to the Quantum Cryptography & Security research area in the Quantum Articles archive.
  • It adds a 2020 reference point for readers tracking recent quantum research.
  • We propose a method named as double-scanning method, to improve the key rate of measurement-device-independent quantum key distribution (MDI-QKD) drastically.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2007.08915 [2] arXiv https://arxiv.org/abs/2007.08915 [3] Publisher https://arxiv.org/abs/2007.08915

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