The latest breakthroughs in quantum technologies, such as satellite quantum communications, present new challenges, imposing stringent restrictions on weight, size, and power consumption of quantum information systems. Here, we show that nonlinear and quantum optics provides powerful resources to confront these challenges by offering attractive solutions for photon-pair counting and quantum-entanglement detection. We demonstrate a low-cost, readily miniaturizable photon-pair counting module, which consumes less than 100 μAh during a sub-10 ms power-on/off measurement cycle, thus providing a meaningful performance as a promising component for satellite quantum technologies.

在量子技术，如卫星通信量子，提出新的挑战，在重量，尺寸气势严格的限制，与量子信息系统的功耗的最新突破。在这里，我们表明，非线性和量子光学提供了强大的资源，通过为光子对计数和量子纠缠检测吸引力的解决方案，以应对这些挑战。我们展示了一个低成本，容易小型化的光子对的计数模块，其消耗少于100 μ在子10毫秒电源接通/关断测量周期啊，从而提供一个有意义的性能作为卫星量子技术有希望的组件。