Exciting, Cooling And Vortex Trapping In A Bose-Condensed Gas

TL;DR

This paper presents a numerical method based on the Gross-Pitaevskii equation to model evaporative cooling and vortex trapping in a Bose-Einstein condensate, demonstrating potential for vortex state trapping in 2D systems.

Contribution

It introduces a self-consistent numerical approach to simulate evaporative cooling and vortex trapping in dilute boson gases using the Gross-Pitaevskii equation.

Findings

Rethermalization produces a cooler condensate.

Vortex trapping in 2D environments is feasible.

Method effectively models thermally-excited states.

Abstract

A straight forward numerical technique, based on the Gross-Pitaevskii equation, is used to generate a self-consistent description of thermally-excited states of a dilute boson gas. The process of evaporative cooling is then modelled by following the time evolution of the system using the same equation. It is shown that the subsequent rethermalisation of the thermally-excited state produces a cooler coherent condensate. Other results presented show that trapping vortex states with the ground state may be possible in a two-dimensional experimental environment.