Current proposals for scalable photonic quantum technologies require on-demand sources of indistinguishable single photons with very high efficiency (having unheralded loss below 1%). Even with recent progress in the field there is still a significant gap between the requirements and state of the art performance. Here, we propose an on-chip source of multiplexed, heralded photons. Using quantum feedback control on a photon storage cavity with an optimized driving protocol, we estimate an on-demand efficiency of 99% and unheralded loss of order 1%, assuming high efficiency detectors and intrinsic cavity quality factors of order 108. We further explain how temporal- and frequency-multiplexing can be used in parallel to significantly reduce device requirements if single photon frequency conversion is possible with efficiency in the same range of 99%.
@article{arxiv.1708.08875,
title = {Temporally and spectrally multiplexed single photon source using quantum feedback control for scalable photonic quantum technologies},
author = {Mikkel Heuck and Mihir Pant and Dirk Englund},
journal= {arXiv preprint arXiv:1708.08875},
year = {2018}
}