Space quantum communication networks

Satellite constellations have the potential for enabling globe-spanning quantum networks for secure communication, entanglement distribution, and eventually the quantum internet. The architecture, design, and operation of such space quantum networks face several challenges, from scheduling, performance analysis and optimization, and overcoming issues such as weather effects. Here, we summarise recent research into constellation design, optimization, and the incorporation of quantum memories and repeaters in space quantum communication links. These preliminary works offer guidance for future development efforts for long-term space quantum communication systems.