Perturbation theory for systems with strong short-ranged interactions
Artikel i vetenskaplig tidskrift, 2007

We propose a variant of thermodynamic perturbation theory based on the Mayer f-function which is applicable to strongly repulsive, and even singular interactions. The expansion of the free energy is successfully tested against known 'exact results' for hard-sphere fluids, and then applied to binary mixtures of particles with non-additive hard cores or shouldered potentials. The resulting phase diagrams agree well with existing simulation data and theoretical predictions.

strong interactions

hard sphere

binary mixture

statistical physics

Perturbation theory


Per Sillrén

Chalmers, Teknisk fysik

Jean-Pierre Hansen

Molecular Physics

0026-8976 (ISSN) 1362-3028 (eISSN)

Vol. 105 1803-1811