Entropy of the cell fluid model with Curie-Weiss interaction
Statistical Mechanics
2025-10-28 v1
Abstract
Entropy of the cell fluid model with Curie-Weiss interaction is obtained in analytical form as a function of temperature and chemical potential. A parametric equation is derived representing the entropy as a function of density. Features of both the entropy per particle and the entropy per cell are investigated at the entropy-density and entropy-chemical potential planes. The considered cell model is a multiple-occupancy model and possesses an infinite sequence of first-order phase transitions at sufficiently low temperatures. We find that the entropy exhibits pronounced minima at around integer-valued particle densities, which may be a generic feature of multiple-occupancy models.
Cite
@article{arxiv.2510.22700,
title = {Entropy of the cell fluid model with Curie-Weiss interaction},
author = {R. V. Romanik and O. A. Dobush and M. P. Kozlovskii and I. V. Pylyuk and M. A. Shpot},
journal= {arXiv preprint arXiv:2510.22700},
year = {2025}
}