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

• URL: http://arxiv.org/abs/2011.13092v1
• Date: Thu, 26 Nov 2020 02:11:53 GMT
• Title: Recent advances on quantum key distribution overcoming the linear secret key capacity bound
• Authors: Yingqiu Mao, Pei Zeng, Teng-Yun Chen
• Abstract summary: A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. 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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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