Self-energy-functional theory
Abstract
Self-energy-functional theory is a formal framework which allows to derive non-perturbative and thermodynamically consistent approximations for lattice models of strongly correlated electrons from a general dynamical variational principle. The construction of the self-energy functional and the corresponding variational principle is developed within the path-integral formalism. Different cluster mean-field approximations, like the variational cluster approximation and cluster extensions of dynamical mean-field theory are derived in this context and their mutual relationship and internal consistency are discussed.
Cite
@article{arxiv.1108.2183,
title = {Self-energy-functional theory},
author = {Michael Potthoff},
journal= {arXiv preprint arXiv:1108.2183},
year = {2011}
}
Comments
chapter in "Theoretical Methods for Strongly Correlated Systems", edited by A. Avella and F. Mancini, Springer (2011), 38 pages, 10 figures