Bose condensation at high temperatures

TL;DR

This paper explores how Bose condensation can occur at high temperatures when particle density is sufficiently large, using an effective theory to compute the transition temperature in a complex scalar field model.

Contribution

It introduces a framework to study high-temperature Bose condensation and calculates the transition temperature for a specific scalar field theory with weak interactions.

Findings

Bose condensation can occur at temperatures much higher than particle mass.

A three-dimensional effective theory effectively describes the thermal properties.

Transition temperature depends on particle density and interaction strength.

Abstract

Bose condensation is usually a low temperature phenomenon due to a low particle number density. When the number density is kept large compared to the inverse Compton volume, Bose condensation can occur at a temperature much higher than the mass of the particle. We can then use a three dimensional effective theory to study the thermal properties. We compute the transition temperature for a complex scalar field theory with a small interaction parameter.