System-adapted correlation energy density functionals from effective pair interactions
Abstract
We present and discuss some ideas concerning an ``average-pair-density functional theory'', in which the ground-state energy of a many-electron system is rewritten as a functional of the spherically and system-averaged pair density. These ideas are further clarified with simple physical examples. We then show that the proposed formalism can be combined with density functional theory to build system-adapted correlation energy functionals. A simple approximation for the unknown effective electron-electron interaction that enters in this combined approach is described, and results for the He series and for the uniform electron gas are briefly reviewed.
Cite
@article{arxiv.cond-mat/0503071,
title = {System-adapted correlation energy density functionals from effective pair interactions},
author = {Paola Gori-Giorgi and Andreas Savin},
journal= {arXiv preprint arXiv:cond-mat/0503071},
year = {2009}
}
Comments
to appear in Phil. Mag. as part of Conference proceedings for the "Electron Correlations and Materials Properties", Kos Greece, July 5-9, 2004