Fluctuation profiles in inhomogeneous fluids
Soft Condensed Matter
2026-04-08 v1 Statistical Mechanics
Abstract
Three one-body profiles that correspond to local fluctuations in energy, in entropy, and in particle number are used to describe the equilibrium properties of inhomogeneous classical many-body systems. Local fluctuations are obtained from thermodynamic differentiation of the density profile or equivalently from average microscopic covariances. The fluctuation profiles follow from functional generators and they satisfy Ornstein-Zernike relations. Computer simulations reveal markedly different fluctuations in confined fluids with Lennard-Jones, hard sphere, and Gaussian core interactions.
Cite
@article{arxiv.2012.05594,
title = {Fluctuation profiles in inhomogeneous fluids},
author = {Tobias Eckert and Nex C. X. Stuhlmüller and Florian Sammüller and Matthias Schmidt},
journal= {arXiv preprint arXiv:2012.05594},
year = {2026}
}