标题： 通过纠缠量子行走者的安全量子密钥分发 显示英文标题

标题： Secure Quantum Key Distribution via Entangled Quantum Walkers

摘要： 量子密钥分发（QKD）是一种新兴的加密方法，旨在实现安全的密钥共享。 其安全性理论上由量子力学的基本原理保证，使其成为未来通信协议的首选方案。 量子随机游走（QRWs）则是表现出诸如干涉和叠加等有趣现象的量子过程，能够生成去中心化和非对称的概率分布。 受这两个研究领域的启发，我们提出了一种基于两个纠缠量子行者的新型QKD协议。 我们的协议利用行走者在行走极端位置之间的独特相关性，以建立仅由双方共享的秘密密钥。 该协议的安全性通过分析行走者测量位置及其相关硬币状态的联合概率分布来增强。 显示英文摘要

摘要： Quantum Key Distribution (QKD) is an emerging cryptographic method designed for secure key sharing. Its security is theoretically guaranteed by fundamental principles of quantum mechanics, making it a leading candidate for future communication protocols. Quantum Random Walks (QRWs), on the other hand, are quantum processes that exhibit intriguing phenomena such as interference and superposition, enabling the generation of decentralized and asymmetric probability distributions. Inspired by both fields of study, we propose a novel QKD protocol based on two entangled quantum walkers. Our protocol exploits the unique correlations between the walkers at extremal positions of the walk to establish secret keys shared exclusively by the two parties. The security of the protocol is augmented by analyzing the joint probability distributions of the walkers' measured positions and their associated coin states.