Microscopic theory of heat capacity of liquid helium-4 for temperatures above the critical point

TL;DR

This paper develops a microscopic theoretical model for the heat capacity of liquid helium-4 above the critical temperature, combining internal energy formulas with effective mass calculations, and validates it against experimental data.

Contribution

It introduces a new microscopic approach to analyze the heat capacity of liquid helium-4 above the critical point, incorporating effective mass considerations.

Findings

The model's results align well with experimental data.

The approach provides insights into the thermodynamic behavior of helium-4.

Effective mass calculations improve the accuracy of heat capacity predictions.

Abstract

In this paper, with the corresponding formula for internal energy obtained in Ref. [J. Phys. Stud. {\bf 11}, 259 (2007)], combined with a simple calculation of the effective mass of interacting Bose particles, the behavior of the heat capacity of liquid $^4$He is analyzed numerically for the entire temperature range. The results agree quite well with experimental data.