Collective Lamb Shift and Modified Linewidth of An Interacting Atomic Gas

• URL: http://arxiv.org/abs/2305.01865v2
• Date: Thu, 22 Feb 2024 20:59:56 GMT
• Title: Collective Lamb Shift and Modified Linewidth of An Interacting Atomic Gas
• Authors: Hanzhen Ma, Susanne F. Yelin
• Abstract summary: We introduce a method to theoretically study weakly-driven, low-excited ensembles of two-level atoms. We obtain an analytic description of the collective Lamb shift and linewidth via a self-consistent formalism.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Finding a comprehensive and general description of the collective Lamb shift and cooperative broadening in a radiatively interacting system is a long-standing open question. Both energy levels and linewidth of individual atoms are modified by the exchange of real and virtual photons making up the dipole-dipole interaction. We introduce a method to theoretically study weakly-driven, low-excited ensembles of two-level atoms, and obtain an analytic description of the collective Lamb shift and linewidth via a self-consistent formalism including infinite order of correlations which stem from only two-body interactions. We predict the dependency of these quantities, as measurables, on system parameters: the number density of the ensemble, the detuning of an external probe field, and the geometry of the sample.

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