We demonstrate the possibility of designing efficient, non reciprocal few-photon devices by exploiting the chiral coupling between two waveguide modes and a single quantum emitter. We show how this system can induce non-reciprocal photon transport at the single-photon level and act as an optical diode. Afterwards, we also show how the same system shows a transistor-like behaviour for a two-photon input. The efficiency in both cases is shown to be large for feasible experimental implementations. Our results illustrate the potential of chiral waveguide-emitter couplings for applications in quantum circuitry.
@article{arxiv.1608.04928,
title = {Non-reciprocal few-photon devices based on chiral waveguide-emitter couplings},
author = {C. Gonzalez-Ballestero and Esteban Moreno and F. J. Garcia-Vidal and A. Gonzalez-Tudela},
journal= {arXiv preprint arXiv:1608.04928},
year = {2016}
}
Comments
Mathematica notebook attached for calculation of detection probabilities