标题： 针对相关泄漏源的量子密钥分发安全 显示英文标题

标题： Secure quantum key distribution against correlated leakage source

摘要： 量子密钥分发（QKD）基于量子力学提供信息论安全，然而其实际部署受到源设备缺陷的挑战。 在各种源漏洞中，传输脉冲之间的相关性构成了一种重要但尚未充分研究的安全风险，可能破坏QKD的理论保证。 在本工作中，我们提出了一种在相关性下的QKD安全分析框架，通过扩展和重新排列QKD轮次并利用广义链式法则，首次实现了有限密钥分析。 基于此框架，并受侧信道安全QKD思想的启发，我们开发了一种针对相关泄漏源的安全QKD，仅需对相关范围和制备态的真空分量下限进行表征。 此外，我们的框架可以扩展到其他QKD协议，为考虑由相关性引起的安全部署提供了一种通用方法。 仿真结果表明，我们的协议有效，并且相比现有协议在不完美参数方面具有显著更高的容忍度。 本工作为关闭QKD中的安全漏洞、增强其实用性，并在现实约束条件下确保远距离、高性能的安全通信提供了关键步骤。 显示英文摘要

摘要： Quantum key distribution (QKD) provides information theoretic security based on quantum mechanics, however, its practical deployment is challenged by imperfections of source devices. Among various source loopholes, correlations between transmitted pulses pose a significant yet underexplored security risk, potentially compromising QKD's theoretical guarantees. In this work, we propose a security analysis framework for QKD under correlations, enabling finite-key analysis for the first time by extending and rearranging QKD rounds and leveraging the generalized chain rule. Based on this framework, and inspired by the idea of side-channel-secure QKD, we develop a secure QKD against correlated leakage source only need the characterization of correlation range and the lower bound on the vacuum component of the prepared states. Additionally, our framework can be extended to other QKD protocols, offering a general approach to consider correlation induced security vulnerabilities. The simulation results demonstrate the effectiveness of our protocol and its significantly superior tolerance to imperfect parameters compared to existing protocols. This work provides a crucial step toward closing security loopholes in QKD, enhancing its practicality, and ensuring long-distance,high-performance secure communication under real-world constraints.