Satellite rings and normal modes in rotating clouds of ultra cold atoms

TL;DR

This paper studies the collective behavior and normal modes of rotating ultra cold atom clouds, revealing stable orbital patterns and plasma-like phenomena through fluid modeling and numerical analysis.

Contribution

It introduces a fluid model with a polytropic equation of state to analyze equilibrium profiles and normal modes in rotating cold atom clouds, highlighting stable orbital modes.

Findings

Stable orbital modes predicted in rotating and non-rotating clouds

Normal modes characterized in rotating systems

Equilibrium profiles depend on experimental parameters

Abstract

The multiple scattering of light in a gas of ultra cold atoms is responsible for many exciting features observed in magneto-optical traps including the collective behavior forced by a Coulomb like potential. This field also induces plasma like phenomena in the cloud which allows the treatment of the system as a one component trapped plasma. With a fluid description and casting the thermodynamical behavior in the form of a polytropic equation of state we investigate the equilibrium profiles of rotating clouds and its dependence on the experiment characteristics. Numerical solutions predict the formation of stable orbital modes both in rotating and non rotating clouds. We also investigate the normal modes on such rotating systems.