Thermodynamic properties of interacting bosons with zero chemical potential

Thermodynamics properties of an interacting system of bosons are considered at finite temperatures and zero chemical potential within the Skyrme-like mean-field model. An interplay between attractive and repulsive interactions is investigated. As a particular example an equilibrium system of pions is discussed. Several modifications of thermodynamic properties in the considered system are found with increasing a strength of attractive forces. Different types of the first order phase transition are classified. Some of these transitions exist also in the Boltzmann approximation. However, effects of the Bose statistics introduce the notable additional changes in the thermodynamic quantities due to a possibility of the Bose-Einstein condensation.

Automated summary

Thermodynamic properties of an interacting system of bosons at finite temperatures and zero chemical potential were studied within the Skyrme-like mean-field model, focusing on the interplay between attractive and repulsive interactions. Various modifications in thermodynamic properties were found as the strength of attractive forces increased, leading to different types of first order phase transitions. While some of these transitions also exist in the Boltzmann approximation, the effects of Bose statistics introduce significant additional changes in the thermodynamic quantities due to the possibility of Bose-Einstein condensation.