Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:2310.01855

Multipartite Entanglement in Bright Frequency Combs from Microresonators

Adrien Bensemhoun, Carlos González-Arciniegas, Olivier Pfister, Laurent Labont, Jean Etesse, Anthony Martin, Sébastien Tanzilli, Giuseppe Patera, Virginia D’Auria

Published Oct 3, 2023• 1 citation
arXivHTMLPDF

Abstract

We present a theoretical model of multimode quantum correlations in bright frequency combs generated in continuous-wave regime by microresonators above threshold. Our analysis shows how these correlations emerge from cascading four-wave mixing processes fed by the input pump as well as the generated bright beams. Logarithmic negativity criterion is employed to quantify entanglement between partitions of modes, demonstrating the transition from a bipartite regime just above the oscillation threshold to the multipartite one at higher input pump powers. Due to its generality, our model can be safely used to describe other kinds of non-linear $χ$ (3) cavities.

DOI
10.48550/arxiv.2310.01855

Related papers

Multipartite quantum correlation in bright frequency combs out of microresonators

Adrien Bensemhoun, Silvia Cassina, Carlos González-Arciniegas +12 more

Our work shows the existence of multipartite quantum correlations in bright frequency combs at the output of a microresonator integrated on silicon nitride platform. Multipartite features go beyond so far reported two-mode correlation and naturally arise due to a cascade of non-linear optical processes that, contrarily to other common experimental configurations, can be initiated by a single-color laser pump. We experimentally illustrate this behaviour by detecting the quantum correlation on the intensity noise spectra of up to 4 bright modes. Presented results, as well as the theoretical and experimental tools dedicated to their measurement, open the way to the exploitation of frequency combs for future quantum technology applications in continuous variable multipartite quantum photonics

International Conference on Transparent Optical Networks•Jul 6, 2025•0 citations

Multipartite quantum correlated bright frequency combs

Adrien Bensemhoun, S. Cassina, C. Gonzalez-Arciniegas +12 more

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 − 2.5 dB and − 2 dB , 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.

arXiv:2501.07252•Physical Review Research•Jul 16, 2025•1 citation

Experimental evidence of multimode quantum correlations in bright SiN microcombs

Adrien Bensemhoun, Silvia Cassina, Carlos González-Arciniegas +14 more

We demonstrate multimode quantum correlation in bright frequency combs out of a SiN microresonator. Multimode features naturally arise due to a cascade of non-linear optical process, making one CW pump sufficient to initiate their generation.

Optical Fiber Communication Conference•Jan 1, 2025•0 citations

Large-scale multipartite entanglement in the quantum optical frequency comb

Reihaneh Shahrokhshahi, Olivier Pfister

We show theoretically that multipartite entanglement is generated on a massive scale in the spectrum, or optical frequency comb, of a single optical parametric oscillator (OPO) emitting well above threshold. In this system, the quantum dynamics of the strongly depleted pump field are responsible for the onset of the entanglement by correlating the two-mode squeezed, bipartite-entangled pairs of OPO signal fields. (Such pairs are independent of one another in the undepleted, classical pump approximation.) We verify the multipartite nature of the entanglement by evaluating the van Loock-Furusawa criterion for a particular set of entanglement witnesses deduced from physical considerations.

Quantum Information and Computation•Nov 1, 2012•1 citation

Quantum correlations in integrated photonic frequency combs

Laurent Labonté, Adrien Bensemhoun, Dorian Oser +12 more

Integrated photonic platforms provide a powerful route toward scalable and stable quantum light sources. In this presentation, we explore how quantum correlations can be generated, distributed, and characterized in the frequency domain using integrated photonic frequency combs. Relying on Kerr nonlinear microresonators operated below and above threshold, we demonstrate the generation of discrete entangled photon pairs as well as bright multipartite quantum states involving many spectral modes. We show how frequency multiplexing enables both multi-user quantum communication and enhanced data rates, while remaining fully compatible with integrated photonic circuits. Beyond bipartite entanglement, we report direct signatures of genuine multipartite quantum correlations in bright frequency combs. These results highlight integrated photonics as a versatile and scalable platform for multimode quantum technologies in communication, sensing, and metrology.

Integrated Photonics Platforms•May 29, 2026•0 citations

Bright six-partite continuous variable entanglement using cascaded four-wave mixing processes in a four-level atomic system

Guangqiang He, Xuefei Wu, Yi Gu

We theoretically show that bright six-partite continuous-variable entanglement can be generated using cascaded four-wave mixing effects of third-order nonlinearity atomic systems above threshold. The six-partite continuous-variable entanglement among the six cavity fields with different frequencies is analyzed by applying optimized inseparability criteria proposed by Van Loock and Furusawa.

arXiv:1109.2221•Sep 10, 2011•0 citations
We present a theoretical model of multimode quantum correlations in bright frequency combs generated in continuous-wave regime by microresonators above threshold. Our analysis shows how these correlations emerge from cascading four-wave mixing processes fed by the input pump as well as the generated bright beams. Logarithmic negativity criterion is employed to quantify entanglement between partitions of modes, demonstrating the transition from a bipartite regime just above the oscillation threshold to the multipartite one at higher input pump powers. Due to its generality, our model can be safely used to describe other kinds of non-linear χχχ (3) cavities.
Our work shows the existence of multipartite quantum correlations in bright frequency combs at the output of a microresonator integrated on silicon nitride platform. Multipartite features go beyond so far reported two-mode correlation and naturally arise due to a cascade of non-linear optical processes that, contrarily to other common experimental configurations, can be initiated by a single-color laser pump. We experimentally illustrate this behaviour by detecting the quantum correlation on the intensity noise spectra of up to 4 bright modes. Presented results, as well as the theoretical and experimental tools dedicated to their measurement, open the way to the exploitation of frequency combs for future quantum technology applications in continuous variable multipartite quantum photonics
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 − 2.5 dB and − 2 dB , 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.
We show theoretically that multipartite entanglement is generated on a massive scale in the spectrum, or optical frequency comb, of a single optical parametric oscillator (OPO) emitting well above threshold. In this system, the quantum dynamics of the strongly depleted pump field are responsible for the onset of the entanglement by correlating the two-mode squeezed, bipartite-entangled pairs of OPO signal fields. (Such pairs are independent of one another in the undepleted, classical pump approximation.) We verify the multipartite nature of the entanglement by evaluating the van Loock-Furusawa criterion for a particular set of entanglement witnesses deduced from physical considerations.
Integrated photonic platforms provide a powerful route toward scalable and stable quantum light sources. In this presentation, we explore how quantum correlations can be generated, distributed, and characterized in the frequency domain using integrated photonic frequency combs. Relying on Kerr nonlinear microresonators operated below and above threshold, we demonstrate the generation of discrete entangled photon pairs as well as bright multipartite quantum states involving many spectral modes. We show how frequency multiplexing enables both multi-user quantum communication and enhanced data rates, while remaining fully compatible with integrated photonic circuits. Beyond bipartite entanglement, we report direct signatures of genuine multipartite quantum correlations in bright frequency combs. These results highlight integrated photonics as a versatile and scalable platform for multimode quantum technologies in communication, sensing, and metrology.