Global quantum networks for secure communication can be realized using large fleets of satellites distributing entangled photon pairs between ground-based nodes. Because the cost of a satellite depends on its size, the smallest satellites will be most cost-effective. This Letter describes a miniaturized, polarization entangled, photon-pair source operating on board a nano-satellite. The source violates Bell’s inequality with a Clauser–Horne–Shimony–Holt parameter of $2.60 \pm 0.06$. This source can be combined with optical link technologies to enable future quantum communication nano-satellite missions.

中文翻译：

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纳米卫星上的纠缠演示

可以使用大批卫星在地面节点之间分布纠缠的光子对来实现用于安全通信的全球量子网络。由于卫星的成本取决于其大小，因此最小的卫星将最具成本效益。这封信描述了在纳米卫星上运行的小型化，偏振纠缠的光子对源。源违反了Bell的不等式，其Clauser–Horne–Shimony–Holt参数为$ 2.60 \ pm 0.06 $。该源可与光链路技术结合使用，以实现未来的量子通信纳米卫星任务。