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<p>The data post-processing scheme based on two-way classical communication(TWCC) can improve the tolerable bit error rate and expand the secure transmission distance when used in QKD system. In this paper, we demonstrate a significant improvement in key rate and secure transmission distance when two-way classical communication is applied in MDI-QKD protocol. Additionally, to further improve the performance of the MDI-QKD system, we extend the TWCC to MDI-QKD considering statistical fluctuations. Our simulation results show that the two-way classical communication method has great advantages in improving the performance of the actual MDI-QKD system.</p>

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Practical measurement-device-independent quantum key distribution with two-way classical communication

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Chun Zhou,
  • Haitao Wang,
  • Jianing Guo,
  • Yanmei Zhao,
  • Ping Wang,
  • Hongwei Li,
  • Wansu Bao

摘要

The data post-processing scheme based on two-way classical communication(TWCC) can improve the tolerable bit error rate and expand the secure transmission distance when used in QKD system. In this paper, we demonstrate a significant improvement in key rate and secure transmission distance when two-way classical communication is applied in MDI-QKD protocol. Additionally, to further improve the performance of the MDI-QKD system, we extend the TWCC to MDI-QKD considering statistical fluctuations. Our simulation results show that the two-way classical communication method has great advantages in improving the performance of the actual MDI-QKD system.