论文标题
检测双场量子键分布中的相关错误
Detecting correlated errors in twin-field quantum key distribution
论文作者
论文摘要
我们通过实验表明，我们可以使用与自洽断层扫描有关的技术来检测双场量子键分布（TFQKD）系统中的相关误差。我们基于光纤 - 萨格纳克环（Fiber-Sagnac Loop）实现TFQKD系统，其中爱丽丝（Alice）和鲍勃（Bob）在较弱的相干状态阶段编码信息，该信息围绕环路周围相反的方向传播。这些州在退出循环时干涉，并由第三方查理（Charlie）检测到，他们向爱丽丝和鲍勃报告了他们的测量结果。我们发现，爱丽丝和鲍勃有可能在不信任自己的个人状态，而不信任查理的测量结果的同时，检测相关的状态预先准备和测量错误。
We experimentally demonstrate that we can detect correlated errors in a twin-field quantum key distribution (TFQKD) system by using a technique that is related to self-consistent tomography. We implement a TFQKD system based on a fiber-Sagnac loop, in which Alice and Bob encode information in the phase of weak coherent states that propagate in opposite directions around the loop. These states interfere as they exit the loop and are detected by a third party, Charlie, who reports the results of their measurements to Alice and Bob. We find that it is possible for Alice and Bob to detect correlated state-preparation and measurement errors while trusting only their own individual states, and without trusting Charlie's measurements.
