基于修改相干态的双场量子密钥分发方案数据

主要面向量子通信应用问题开展研究，受到国家重点研发计划项目2017YFA0304103支持。双场量子密钥分发(TF-QKD)协议是为了在不使用量子中继器的情况下突破量子密钥分发的速率-距离限制;同时，它可以提供与测量设备无关的安全级别。此文中，我们提出了利用修改相干态来提高TF-QKD协议的性能。基于Wang等人提出的发送或不发送TF-QKD，我们研究了有限数据量下修改相干态的密钥率，并与使用弱相干态的密钥率进行了比较。通过数值模拟，我们证明了改进的相干态比后者更能显著提高量子密钥分配的性能。数据量为158KB。

This work focuses on research for quantum communication applications, supported by the National Key R&D Program of China under Grant No. 2017YFA0304103. The twin-field quantum key distribution (TF-QKD) protocol is designed to break the rate-distance limit of quantum key distribution (QKD) without using quantum repeaters, while providing measurement-device-independent security. In this paper, we propose to use modified coherent states to improve the performance of the TF-QKD protocol. Based on the send-or-not-send TF-QKD protocol proposed by Wang et al., we investigate the secret key rate of modified coherent states under finite data size, and compare it with the secret key rate using weak coherent states. Through numerical simulations, we demonstrate that the improved coherent states can significantly enhance the performance of quantum key distribution compared to the weak coherent states. The data size is 158 KB.

搜集汇总

背景与挑战

背景概述

该数据集面向量子通信应用，研究双场量子密钥分发（TF-QKD）协议，旨在突破速率-距离限制并提供测量设备无关的安全级别。通过采用修改相干态，该方案提升了协议性能，并在有限数据量下与弱相干态进行了对比验证。