AI 中文总结
针对QEYSSat任务，提出基于蒙特卡罗的光子模拟器，可纳入卫星相关实验参数以预测验证数据，为地面至QEYSSat量子链路数字孪生提供基准。
AI 中文摘要
物理系统的模拟需要高保真模型才能准确反映现实。简单模型可能具有解析可处理性，但对于特定应用而言可能不足以代表现实，这种简单性的代价是精度，对于量子密钥分发来说则是可证明的安全性。精度差距的来源包括难以建模不适用于解析描述的物理效应，例如后脉冲效应。在此，我们针对量子加密与科学卫星（Quantum Encryption and Science Satellite, QEYSSat）任务，提出了一种新颖的基于蒙特卡罗的光子发射、传输与检测模拟器。在该模拟器中，光子从发射到检测过程中可能经历的每一种主要物理效应，都能以概率方式被考虑。该方法可纳入与卫星任务相关的实验参数及其对安全密钥长度的影响。该模拟器为即将开展的QEYSSat任务提供了预测和验证实验数据的综合基准。
英文摘要
Simulations of physical systems require high-fidelity models to accurately represent reality. Simple models may be analytically tractable, but may not be sufficiently representative of reality for the given application. The cost of this simplicity is accuracy, or in the case of quantum key distribution, provable security. Sources of this accuracy gap include the difficulty of modelling physical effects which do not lend themselves well to analytical descriptions, such as afterpulsing. Here, we introduce a novel Monte Carlo based photon emission, transmission, and detection simulator, designed in the context of the Quantum Encryption and Science Satellite (QEYSSat) mission. Within this simulator, every major physical effect a photon may experience during an experiment, from emission to detection, can be accounted for in a probabilistic manner. This methodology allows for the inclusion of experimental parameters which are relevant for a satellite mission, and their impacts on secure key lengths. This simulator serves as a comprehensive baseline to predict and validate experimental data for the upcoming QEYSSat mission.
Comments18 pages, 9 figures
