Thermodynamics of a weakly interacting Bose gas above the transition temperature

TL;DR

This paper investigates the thermodynamic properties of weakly interacting Bose gases above the transition temperature using perturbation theory, providing analytical and numerical results that serve as benchmarks for dilute atomic and molecular gases.

Contribution

It introduces a comprehensive analysis of thermodynamic properties of weakly interacting Bose gases above the transition temperature, including local and non-local interactions, with new analytical and numerical results.

Findings

Temperature dependencies of chemical potential, entropy, pressure, and specific heat are characterized.

Results establish reliable benchmarks for thermodynamic behavior in dilute Bose gases.

Comparison between interacting and noninteracting gases highlights interaction effects.

Abstract

We study thermodynamic properties of weakly interacting Bose gases above the transition temperature of Bose-Einstein condensation in the framework of a thermodynamic perturbation theory. Cases of local and non-local interactions between particles are analyzed both analytically and numerically. We obtain and compare the temperature dependencies for the chemical potential, entropy, pressure, and specific heat to those of noninteracting gases. The results set reliable benchmarks for thermodynamic characteristics and their asymptotic behavior in dilute atomic and molecular Bose gases above the transition temperature.