The EXP pair-potential system. II. Fluid phase isomorphs
Abstract
This paper continues the investigation of the exponentially repulsive EXP pair-potential system of Paper I with a focus on isomorphs in the low-temperature gas and liquid phases. As expected from the EXP system's strong virial potential-energy correlations, the system's reduced-unit structure and dynamics are isomorph invariant to a good approximation. Three methods for generating isomorphs are compared: the small-step method that is exact in the limit of small density changes and two versions of the direct-isomorph-check method that allows for much larger density changes. Results from approximate methods are compared to those of the small-step method for each of three isomorphs generated by 230 one percent density increases, covering in all one decade of density variation. Both approximate methods work well.
Cite
@article{arxiv.1807.10958,
title = {The EXP pair-potential system. II. Fluid phase isomorphs},
author = {Andreas Kvist Bacher and Thomas B. Schrøder and Jeppe C. Dyre},
journal= {arXiv preprint arXiv:1807.10958},
year = {2018}
}