Comment on `Universal relation between the Kolmogorov-Sinai entropy and the thermodynamic entropy in simple liquids'

TL;DR

This paper critically examines the proposed universal relation between Kolmogorov-Sinai entropy and thermodynamic entropy, demonstrating that it does not apply to hard sphere and hard disk systems, challenging previous assumptions.

Contribution

It provides a critical analysis showing the limitations of the universal relation in specific simple liquid models, namely hard sphere and hard disks systems.

Findings

The relation does not hold for hard sphere systems.

The relation does not hold for hard disk systems.

Challenges the universality of the proposed entropy relation.

Abstract

The intriguing relations between Kolmogorov-Sinai entropy and self diffusion coefficients and the excess (thermodynamic) entropy found by Dzugutov and collaborators do not appear to hold for hard sphere and hard disks systems.