Space-to-space quantum communications

Rupert Ursin, Dominique Elser

I will present recent feasibility studies demonstrating quantum communication on ground, over a 140 km free-space link as well as studies proving the feasibility to perform such kind of experiments in space.

F. J. Duarte

Yu Liu, Yue Li, Huang Fan

We give a feasibility analysis on entanglement distribution in quantum repeater-based space quantum communication. After a quick review of the Quantum Repeater techniques, two typical communication scenarios are provided as examples and a further feasibility analysis for entanglement distribution in general deep space quantum communication on link requirements, transmission attenuations and terminal requirements are documented.

F.J. Duarte

Duncan McArthur, Jasminder S. Sidhu, Colin Aitken +5 more

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.

F. J. Duarte