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Article Dans Une Revue Physical Review Letters Année : 2024

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

Résumé

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.

Dates et versions

hal-04342475 , version 1 (13-12-2023)

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Citer

Giovanni Ferioli, Sara Pancaldi, Antoine Glicenstein, David Clément, Antoine Browaeys, et al.. Non-Gaussian correlations in the steady-state of driven-dissipative clouds of two-level atoms. Physical Review Letters, 2024, pp.133601. ⟨10.1103/PhysRevLett.132.133601⟩. ⟨hal-04342475⟩
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