Quantum teleportation of propagating quantum microwaves

TL;DR

This paper explores the feasibility of implementing quantum teleportation and repeaters for propagating quantum microwaves, advancing microwave quantum communication despite current technological challenges.

Contribution

It proposes a realistic implementation of microwave quantum teleportation with losses and introduces a method for quantum repeaters without photodetection.

Findings

Feasibility of microwave quantum teleportation with losses

Proposal for microwave quantum repeaters without photodetection

Potential to enable long-distance microwave quantum communication

Abstract

Propagating quantum microwaves have been proposed and successfully implemented to generate entanglement, thereby establishing a promising platform for the realisation of a quantum communication channel. However, the implementation of quantum teleportation with photons in the microwave regime is still absent. At the same time, recent developments in the field show that this key protocol could be feasible with current technology, which would pave the way to boost the field of microwave quantum communication. Here, we discuss the feasibility of a possible implementation of microwave quantum teleportation in a realistic scenario with losses. Furthermore, we propose how to implement quantum repeaters in the microwave regime without using photodetection, a key prerequisite to achieve long distance entanglement distribution.