Statistical fluctuation analysis for measurement-device-independent quantum key distribution with three-intensity decoy-state method

Zong-Wen Yu, Yi-Heng Zhou, and Xiang-Bin Wang
Phys. Rev. A 91, 032318 – Published 23 March 2015

Abstract

We present an improved statistical fluctuation analysis for measurement-device-independent quantum key distribution with a three-intensity decoy-state method. Taking the statistical fluctuations for different sources jointly, we present more tightened formulas for some key quantities used in calculating the secure final key. Numerical simulation shows that, given the total number of pulses 1012, our method improves the key rate by about 97% for a distance of 50 km compared with the result given by Xu et al. [F. Xu et al., Phys. Rev. A 89, 052333 (2014)], and improves the key rate by 145% for a distance of 100 km compared with the result from full optimization of all parameters but treating the statistical fluctuations traditionally, i.e., treating the fluctuations for different sources separately.

  • Figure
  • Received 13 October 2014
  • Revised 25 January 2015

DOI:https://doi.org/10.1103/PhysRevA.91.032318

©2015 American Physical Society

Authors & Affiliations

Zong-Wen Yu1,2, Yi-Heng Zhou1,3, and Xiang-Bin Wang1,3,4,*

  • 1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
  • 2Data Communication Science and Technology Research Institute, Beijing 100191, People's Republic of China
  • 3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China Hefei, Anhui 230026, People's Republic of China
  • 4Jinan Institute of Quantum Technology, SAICT, Jinan 250101, People's Republic of China

  • *xbwang@mail.tsinghua.edu.cn; Also at Tsinghua University, Center for Atomic and Molecular Nanosciences.

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Vol. 91, Iss. 3 — March 2015

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