Anisotropic fluorescence signals retarded dipole-dipole interactions in a thermal atomic cloud

• URL: http://arxiv.org/abs/2508.11480v2
• Date: Mon, 01 Sep 2025 07:27:46 GMT
• Title: Anisotropic fluorescence signals retarded dipole-dipole interactions in a thermal atomic cloud
• Abstract summary: We experimentally observe and theoretically explain anisotropic multiple quantum coherence signals in the fluorescence from dilute thermal potassium vapors.<n>We identify the retarded part of the geometrically fully resolved inter-atomic, resonant dipole-dipole interaction as the crucial ingredient to theoretically reproduce all qualitative features of the experimental spectra.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We experimentally observe and theoretically explain anisotropic multiple quantum coherence signals in the fluorescence from dilute thermal potassium vapors, at room temperature and particle densities $\sim 10^8\ \rm{cm}^{-3}$. We identify the retarded part of the geometrically fully resolved inter-atomic, resonant dipole-dipole interaction as the crucial ingredient to theoretically reproduce all qualitative features of the experimental spectra.

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