Optoelectromechanical transducer: reversible conversion between microwave and optical photons

TL;DR

This paper reviews recent advances in optoelectromechanical transducers that enable reversible quantum state conversion between microwave and optical photons, crucial for quantum communication and scalable quantum networks.

Contribution

It summarizes recent theoretical and experimental progress in coherent microwave-optical conversion using optoelectromechanical transducers, highlighting challenges and future perspectives.

Findings

Progress in achieving coherent microwave-optical conversion

Development of mechanical resonators as quantum interfaces

Discussion of challenges in single-photon-level conversion

Abstract

Quantum states encoded in microwave photons or qubits can be effectively manipulated, whereas optical photons can be coherently transferred via optical fibre and waveguide. The reversible conversion of quantum states between microwave and optical photons will hence enable the distribution of quantum information over long distance and significantly improve the scalability of hybrid quantum systems. Owning to technological advances, mechanical resonators couple to quantum devices in distinctly different spectral range with tunable coupling, and can serve as a powerful interface to connect those devices. In this review, we summarize recent theory and experimental progress in the coherent conversion between microwave and optical fields via optoelectromechanical transducers. The challenges and perspectives in achieving single-photon-level quantum state conversion will also be discussed.