论文标题
Leo小卫星QKD下行链路性能：Quantat-PT案例研究
LEO small satellite QKD downlink performance: QuantSat-PT case study
论文作者
论文摘要
在这项工作中，我们模拟并模拟了从低地球轨道（LEO）小卫星到光学地面站（OGS）的量子密钥分布（QKD）下行的性能，这是Quantsat-PT Mission的概念和初步设计阶段的组成部分。通过对BB84和E91协议的湍流和大气损失进行详细的下行链路传输通道效应进行建模和模拟，我们发现了绩效信封的一致值集，这些值能够解析以前报告的任务实验数据的歧义。我们为4-STATE BB84协议获得了筛分的密钥率和量子位错误率（QBER）为32.1 kbit/s和$ 4 \％$，对于750 km Orbit，Zenith。对于E91协议，进行了clauser，Horne，Shimony和Holt（CHSH）测试，从而在[-2.63 \ pm0.02，-1.91 \ pm0.03] $中对$ s \进行$ s \的相关系数。讨论了这些结果与最先进的模拟器的一致性及其在基于实验卫星的QKD上的相关性。
In this work, we model and simulate the performance of a quantum key distribution (QKD) downlink from a low earth orbit (LEO) small satellite to an optical ground station (OGS), as integral part of the concept and preliminary design phase of the QuantSat-PT mission. By modelling and simulating in detail downlink transmission channel effects, with emphasis on turbulent and atmospheric losses for BB84 and E91 protocols, we find a consistent set of values for the performance envelope that resolves ambiguities of mission experimental data that had been reported previous to this work. We obtain for the 4-state BB84 protocol a sifted key rate and Quantum Bit Error Rate (QBER) of 32.1 kbit/s and $4\%$, respectively, for zenith at 750 km orbit. For the E91 protocol the Clauser, Horne, Shimony and Holt (CHSH) test was performed resulting in a correlation factor of $S \in[-2.63\pm0.02,-1.91\pm0.03]$ for the mission. The consistency of these results with the state of the art simulators and its relevance on experimental satellite based QKD is discussed.
