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.

在类似 Skyrme 的平均场模型中，在有限温度和零化学势下考虑了​​玻色子相互作用系统的热力学特性。研究了吸引和排斥相互作用之间的相互作用。作为一个特定的例子，我们讨论了介子的平衡系统。在所考虑的系统中，随着吸引力的强度的增加，发现了几种热力学性质的修改。对不同类型的一阶相变进行分类。其中一些跃迁也存在于玻尔兹曼近似中。然而，由于玻色-爱因斯坦凝聚的可能性，玻色统计的影响引入了热力学量的显着额外变化。