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arXiv · 2507.02460

Enhancing Photon Indistinguishability of Spectrally Mismatched Single Photons by Cavity Floquet Engineering

J. W. Yu·X. Q. Zhou·Z. B. Ni·X. T. Cheng·Y. Zhao·H. H. Zhu·C. H. Li·F. Liu·C. Y. Jin
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Abstract

We theoretically propose a scheme to enhance the photon indistinguishability of spectrally mismatched single photons via Floquet-engineered optical frequency combs (OFCs) in cavity quantum electrodynamic systems. By periodically modulating two distinct single-photon states under a modulation frequency which is exactly equal to the spectral mismatch of two cavity modes, a pair of single-photon frequency-comb (SPFC) states is prepared energy-conservatively based on full unitary operations. The two states show high indistinguishability with an ideal $g^{(2)}_\mathrm{HOM}(0)$ down to zero due to the superposition of intensity-matched single-photon states coherently distributed across the teeth of the combs.

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J. W. Yu, X. Q. Zhou, Z. B. Ni, X. T. Cheng, Y. Zhao, H. H. Zhu, C. H. Li, F. Liu, C. Y. Jin. 2025-07-03. Enhancing Photon Indistinguishability of Spectrally Mismatched Single Photons by Cavity Floquet Engineering. https://arxiv.org/abs/2507.02460

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