Free-energy density functional for hard spheres
- 1 April 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 31 (4), 2672-2679
- https://doi.org/10.1103/physreva.31.2672
Abstract
A free-energy density functional for a system of hard spheres is derived on a semiempirical basis. It is constructed to reproduce the thermodynamics and direct correlation function of a homogeneous fluid and then is tested in two highly inhomogeneous situations: the hard-wall–hard-sphere interface and the hard-sphere solid. The results are very good in both cases, showing that this density-functional model may be used with advantage in the study of the hard-sphere model by itself, or used as a reference system in a perturbative analysis.Keywords
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