论文标题
量子密钥分布的最新进展克服了线性秘密钥匙能力约束
Recent advances on quantum key distribution overcoming the linear secret key capacity bound
论文作者
论文摘要
量子密钥分布（QKD）的关键目标是在长距离内传输无条件固定的键。先前的研究表明，点对点QKD的关键速率受到秘密关键率容量约束的限制，较高的关键率将需要量子中继器。在2018年，提出了开创性双场（TF）QKD协议，以提供一个非凡的解决方案来克服线性秘密钥匙能力结合。本文对该领域的最新发展进行了最新调查，包括相匹配QKD和其他TF-QKD类型协议的安全证明，在现实条件下对这些协议的理论检查以及最近的实验演示。
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.
