Kirill Fedorov

Microwave quantum communication is set to play an important role in future quantum networks because of its natural frequency compatibility with superconducting quantum processors and modern near-distance communication standards. To this end, I present the experimental realization of a continuous-variable quantum key distribution (QKD) protocol based on propagating displaced squeezed microwave states, which can be generated and detected using superconducting parametric devices. I demonstrate the unconditional security in our experimental QKD setting with a potential for secure microwave communication over distances up to 1000 m in the cryogenic environment. Furthermore, I present our ongoing efforts towards bringing quantum secure microwave communication to high temperatures by implementing quantum teleportation of coherent microwaves over thermal channels with fidelities exceeding the asymptotic no-cloning threshold. Finally, I discuss the feasibility and possible use cases of room temperature, open-air microwave quantum communication.