基于卫星的量子密钥分发链路：波束效应和天气依赖性
Satellite-based links for Quantum Key Distribution: beam effects and weather dependence
摘要：
全球量子通信网络的建立依赖于基于卫星的链路和基于光纤的网络的协同集成。第一种是有助于长距离通信，因为光纤引入的光子损耗对于长度大于约200 km的光纤来说太有害了。一方面，本文的工作旨在为量子信号在大气自由空间链路中传输时所遭受的损耗提供一个全面的基本模型。另一方面，不同的量子密钥分发（QKD）实现的性能分析，包括有限密钥的影响，侧重于不同的有趣的实际情况。我们选择的具体方法可以精确地模拟不同天气条件下的贡献，为基于卫星的QKD任务的更准确的可行性研究铺平了道路。
英文摘要：
The establishment of a world-wide quantum communication network relies on the synergistic integration of satellite-based links and fiber-based networks. The first are helpful for long-distance communication, as the photon losses introduced by the optical fibers are too detrimental for lengths greater than about 200 km. This work aims at giving, on the one hand, a comprehensive and fundamental model for the losses suffered by the quantum signals during the propagation along an atmospheric free-space link. On the other hand, a performance analysis of different Quantum Key Distribution (QKD) implementations is performed, including finite-key effects, focusing on different interesting practical scenarios. The specific approach that we chose allows to precisely model the contribution due to different weather conditions, paving the way towards more accurate feasibility studies of satellite-based QKD missions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
