Non-Gaussian correlations in the steady-state of driven-dissipative clouds of two-level atoms

• URL: http://arxiv.org/abs/2311.13503v2
• Date: Tue, 13 Feb 2024 13:47:07 GMT
• Title: Non-Gaussian correlations in the steady-state of driven-dissipative clouds of two-level atoms
• Authors: Giovanni Ferioli, Sara Pancaldi, Antoine Glicenstein, David Clement, Antoine Browaeys, Igor Ferrier-Barbut
• Abstract summary: We report experimental measurements of the second-order coherence function $g(2)(tau)$ of the light emitted by a laser-driven dense ensemble of $87$Rb atoms. We conclude that the violation is not due to the emergence of a coherent field.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report experimental measurements of the second-order coherence function $g^{(2)}(\tau)$ of the light emitted by a laser-driven dense ensemble of $^{87}$Rb atoms. We observe a clear departure from the Siegert relation valid for Gaussian chaotic light. Measuring intensity and first-order coherence, we conclude that the violation is not due to the emergence of a coherent field. This indicates that the light obeys non-Gaussian statistics, stemming from non-Gaussian correlations in the atomic medium. More specifically, the steady-state of this driven-dissipative many-body system sustains high-order correlations in the absence of first-order coherence. These findings call for new theoretical and experimental explorations to uncover their origin and they open new perspectives for the realization of non-Gaussian states of light.

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