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Multipartite quantum correlated bright frequency combs

A. Bensemhoun1, S. Cassina2, C. Gonzalez-Arciniegas3, M. F. Melalkia1,*, G. Patera5, J. Faugier-Tovar6, Q. Wilmart6, S. Olivier6, A. Zavatta7 et al.

A. Martin1, J. Etesse1, L. Labonté1, O. Pfister3,4, V. D'Auria1,†, and S. Tanzilli1

  • *Present address: Laboratoire Systèmes Lasers, Ecole Militaire Polytechnique, BP 17 Bordj El Bahri, 16046 Algiers, Algeria.
  • †Contact author: virginia.dauria@univ-cotedazur.fr
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Phys. Rev. Research 7, 033173 – Published 21 August, 2025

DOI: https://doi.org/10.1103/cc69-5gq2

Abstract

This experimental work demonstrates multipartite quantum correlation in bright frequency combs out of a microresonator integrated on silicon nitride operating above its oscillation threshold. Multipartite features, going beyond so far reported two-mode correlation, naturally arise due to a cascade of nonlinear optical processes, making a single-color laser pump sufficient to initiate their generation. Our results show the transition from two-mode to multipartite correlation, witnessed by noise reductions as low as −2.5dB and −2dB, respectively, compared to corresponding classical levels. A constant of the movement of the nonlinear interaction Hamiltonian is identified and used to asses the multipartite behavior. Reported demonstrations pave the way to next generation on-chip multipartite sources for quantum technologies applications.

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Phys. Rev. Research 7, 033173– Published 21 August, 2025
  • Received 10 January 2025
  • Accepted 16 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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