BRISTOL UNIV (UNITED KINGDOM) BRISTOL United Kingdom
An on-demand single-photon source is a key requirement for scaling many optical quantum technologies. A promising approach to realize an on-demand single-photon source is to multiplex an array of heralded single-photon sources using an active optical switching network. However, the performance of multiplexed sources is degraded by photon loss in the optical components and the non-unit detection efficiency of the heralding detectors. We provide a theoretical description of a general multiplexed single-photon source with lossy components and derive expressions for the output probabilities of single-photon emission and multi-photon contamination. We apply these expressions to three specific multiplexing source architectures and consider their tradeoffs in design and performance. To assess the effect of lossy components on near- and long-term experimental goals, we simulate the multiplexed sources when used for many-photon state generation under various amounts of component loss. We find that with a multiplexed source composed of switches with0.20.4 dB loss and high efficiency number-resolving detectors, a single-photon source capable of efficiently producing 2040 photon states with low multi-photon contamination is possible, offering the possibility of unlocking new classes of experiments and technologies.
Journal Article - Open Access
New Journal of Physics , 17, 4, 01 Jan 0001, 01 Jan 0001, See also AD1014586. Open Access: Publishers Version. May be placed on public websites; Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.