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Quantum Cryptography Security

Recent advances on quantum key distribution overcoming the linear secret key capacity bound

arXiv
Authors: Yingqiu Mao, Pei Zeng, Teng-Yun Chen

Year

2020

Paper ID

18971

Status

Preprint

Abstract Read

~2 min

Abstract Words

104

Citations

N/A

Abstract

A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. Previous studies show that the key rate of point-to-point QKD is limited by a secret key rate capacity bound, and higher key rates would require quantum repeaters. In 2018, the seminal twin-field (TF) QKD protocol was proposed to provide a remarkable solution to overcoming the linear secret key capacity bound. This article presents an up-to-date survey on recent developments in this area, including the security proofs of phase-matching QKD and other TF-QKD type protocols, the theoretical examinations of these protocols under realistic conditions, and the recent experimental demonstrations.

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.
  • A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2011.13092 [2] arXiv https://arxiv.org/abs/2011.13092 [3] Publisher https://arxiv.org/abs/2011.13092

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