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arXiv · 2404.11193

Photonic indistinguishability characterization and optimization for cavity-based single-photon source

Miao Cai·Mingyuan Chen·Jiangshan Tang·Keyu Xia
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Abstract

Indistinguishability of single photons from independent sources is critically important for scalable quantum technologies. We provide a comprehensive comparison of single-photon indistinguishability of different kinds of cavity quantum electrodynamics (CQED) systems by numerically simulating Hong-Ou-Mandel (HOM) two-photon interference. We find that the CQED system using nature atoms exhibit superiority in indistinguishability, benefiting from the inherently identical features. Moreover, a $\Lambda-$type three-level atoms show essential robust against variation of various system parameters because it exploits the two ground states with considerable smaller decay rates for single-photon generation. Furthermore, a machine learning-based framework is proposed to significantly and robustly improve single-photon indistinguishability for non-identical two CQED systems. This work may pave the way for designing and engineering reliable and scalable photon-based quantum technologies.

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Miao Cai, Mingyuan Chen, Jiangshan Tang, Keyu Xia. 2024-04-17. Photonic indistinguishability characterization and optimization for cavity-based single-photon source. https://arxiv.org/abs/2404.11193

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