Kinetics of Bose-Einstein condensation in a dimple potential

TL;DR

This paper models the kinetics of Bose-Einstein condensation in a bimodal trap with a dimple, incorporating two- and three-body processes to predict dynamics, optimal parameters, and experimental outcomes.

Contribution

It introduces a detailed kinetic model including two- and three-body processes for Bose-Einstein condensation in dimple traps, providing quantitative predictions and optimization insights.

Findings

Identifies key timescales for condensation.

Predicts condensate yields under various conditions.

Provides guidelines for optimizing experimental parameters.

Abstract

We model the dynamics of condensation in a bimodal trap, consisting of a large reservoir region, and a tight "dimple" whose depth can be controlled. Experimental investigations have found that such dimple traps provide an efficient means of achieving condensation. In our kinetic equations, we include two- and three-body processes. The two-body processes populate the dimple, and lead to loss when one of the colliding atoms is ejected from the trap. The three-body processes produce heating and loss. We explain the principal trends, give a detailed description of the dynamics, and provide quantitative predictions for timescales and condensate yields. From these simulations, we extract optimal parameters for future experiments.