Generalisation of the density-functional theory and three-body interactions in classical fluids
- 13 March 1989
- journal article
- letter
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 1 (10) , 1899-1904
- https://doi.org/10.1088/0953-8984/1/10/013
Abstract
An external field coupled with the two-body density distribution function leads to a generalisation of the density-functional theory in which the free energy is regarded as a functional not only of the density but also of the two-body distribution function. The generalised formalism is applied to the liquid structure theory in the presence of a weak three-body potential. The first-order calculation shows that the three-body effects are fully incorporated into the theory through modification of the pair potential by virtue of the variational property of the free-energy functional.This publication has 24 references indexed in Scilit:
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