Bose-Einstein condensation at constant temperature

TL;DR

This paper introduces a new experimental method for achieving Bose-Einstein condensation by increasing particle number at nearly constant temperature, and models the process with a rate-equation approach.

Contribution

It presents a novel experimental technique for BEC formation and a simple rate-equation model for multi-component BEC thermodynamics.

Findings

Observation of a new condensate in multi-component F=1 spinor condensates of 87-Rb

The rate-equation model accurately reproduces experimental effects

Demonstration of Bose-Einstein condensation at constant temperature

Abstract

We present a novel experimental approach to Bose-Einstein condensation by increasing the particle number of the system at almost constant temperature. In particular the emergence of a new condensate is observed in multi-component F=1 spinor condensates of 87-Rb. Furthermore we develop a simple rate-equation model for multi-component BEC thermodynamics at finite temperature which well reproduces the measured effects.