Population Dynamics in Cold Gases Resulting from the Long-Range Dipole-Dipole Interaction

TL;DR

This paper investigates how long-range dipole-dipole interactions influence excitation exchange, population redistribution, and emission spectra in large cold atomic gases, revealing spatial and spectral effects of these interactions.

Contribution

It provides a detailed analysis of population dynamics and emission spectra caused by dipole-dipole interactions in large cold atomic gases, a novel exploration of these effects.

Findings

Dipole-dipole interactions cause population redistribution in large atomic clouds.

Emission spectra depend on the angle relative to atomic polarization.

Spatial and spectral signatures of dipole interactions are characterized.

Abstract

We consider the effect of the long range dipole-dipole interaction on the excitation exchange dynamics of cold two-level atomic gase in the conditions where the size of the atomic cloud is large as compared to the wavelength of the dipole transition. We show that this interaction results in population redistribution across the atomic cloud and in specific spectra of the spontaneous photons emitted at different angles with respect to the direction of atomic polarization.