Supercritical Crossover Lines in the Cell Fluid Model
Statistical Mechanics
2025-04-08 v1
Abstract
A cell fluid model with a modified Morse potential is studied. The supercritical states are considered with respect to a possibility to build a separation boundary between liquid-like and gas-like bahaviors. Three different lines are calculated that can be used for this purpose: the locus of the isothermal compressibility maxima, the locus of the thermal expansion coefficient maxima, and the line where the effective chemical potential is zero, M=0. By the symmetry of the functionals for the partition functions, the condition M=0 in fluids is analogous to the absence of an external field in the Ising model.
Keywords
Cite
@article{arxiv.2410.23694,
title = {Supercritical Crossover Lines in the Cell Fluid Model},
author = {O. A. Dobush and M. P. Kozlovskii and R. V. Romanik},
journal= {arXiv preprint arXiv:2410.23694},
year = {2025}
}
Comments
10 pages, 5 figures