Sending-or-Not-Sending Twin-Field Quantum Key Distribution with Redundant Space

Hai Xu; Xiao-Long Hu; Cong Jiang; Zong-Wen Yu; Xiang-Bin Wang

Sending-or-Not-Sending Twin-Field Quantum Key Distribution with Redundant Space

Quantum Physics 2023-04-10 v2

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

Abstract

We propose to adopt redundant space such as polarization mode in the sending-or-not-sending Twin-Field quantum key distribution (TF-QKD) in the Fock space. With the help of redundant space such as photon polarization, we can post-select events according to the outcome of the observation to the additional quantity. This compresses the bit-flip error rate in the post-selected events of the SNS protocol. The calculation shows that the method using redundant space can greatly improve the performance in practical TF-QKD, especially when the total number of pulses is small.

Keywords

twin-field quantum key distribution sending-or-not-sending redundant space fock space polarization bit-flip error rate post-selection

Cite

@article{arxiv.2205.05527,
  title  = {Sending-or-Not-Sending Twin-Field Quantum Key Distribution with Redundant Space},
  author = {Hai Xu and Xiao-Long Hu and Cong Jiang and Zong-Wen Yu and Xiang-Bin Wang},
  journal= {arXiv preprint arXiv:2205.05527},
  year   = {2023}
}

Comments

This manuscript has been accepted for publication as a Regular Article in Physical Review Research

Sending-or-Not-Sending Twin-Field Quantum Key Distribution with Redundant Space

Abstract

Keywords

Cite

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