We report the observation of efficient and low-noise frequency conversion between two microwave modes, mediated by the motion of a mechanical resonator subjected to radiation pressure. We achieve coherent conversion of more than 1012photons/s with a 95% efficiency and a 14kHz bandwidth. With less than 10−1photons⋅s−1⋅Hz−1 of added noise, this optomechanical frequency converter is suitable for quantum state transduction. We show the ability to operate this converter as a tunable beam splitter, with direct applications for photon routing and communication through complex quantum networks.
@article{arxiv.1512.00078,
title = {Mechanically mediated microwave frequency conversion in the quantum regime},
author = {F. Lecocq and J. B. Clark and R. W. Simmonds and J. Aumentado and J. D. Teufel},
journal= {arXiv preprint arXiv:1512.00078},
year = {2016}
}