Sending-or-not-sending twin-field protocol for quantum key distribution with asymmetric source parameters

Xiao-Long Hu, Cong Jiang, Zong-Wen Yu, and Xiang-Bin Wang
Phys. Rev. A 100, 062337 – Published 27 December 2019
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  • INTRODUCTION
  • SNS PROTOCOL WITH ASYMMETRIC SOURCE…
  • SECURITY PROOF WITH VIRTUAL PROTOCOLS…
  • NUMERICAL SIMULATION WITH ASYMMETRIC…
  • CONCLUSION
  • ACKNOWLEDGMENTS
  • APPENDICES
    • References

    Abstract

    The sending-or-not-sending (SNS) protocol of the twin-field quantum key distribution can tolerate large misalignment error and its key rate can exceed the linear bound of repeaterless quantum key distribution. But the original SNS protocol requires the two users to use the same source parameters. Here we propose an SNS protocol with asymmetric source parameters and give the security proof of this protocol. Our asymmetric protocol has a much better performance than that of the original SNS protocol when the channel is asymmetric.

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    • Received 12 August 2019

    DOI:https://doi.org/10.1103/PhysRevA.100.062337

    ©2019 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Quantum cryptography
    Quantum Information, Science & Technology

    Authors & Affiliations

    Xiao-Long Hu1, Cong Jiang1, Zong-Wen Yu2, and Xiang-Bin Wang1,3,4,5,*

    • 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, China
    • 3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China Hefei, Anhui 230026, China
    • 4Jinan Institute of Quantum Technology, SAICT, Jinan 250101, People's Republic of China
    • 5Shenzhen Institute for Quantum Science and Engineering, and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China

    • *xbwang@mail.tsinghua.edu.cn

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    Issue

    Vol. 100, Iss. 6 — December 2019

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