Self-energy-functional approach to systems of correlated electrons
Strongly Correlated Electrons
2009-11-10 v1 Superconductivity
Abstract
The grand potential of a system of interacting electrons is considered as a stationary point of a self-energy functional. It is shown that a rigorous evaluation of the functional is possible for self-energies that are representable within a certain reference system. The variational scheme allows to construct new non-perturbative and thermodynamically consistent approximations. Numerical results illustrate the practicability of the method.
Keywords
Cite
@article{arxiv.cond-mat/0301137,
title = {Self-energy-functional approach to systems of correlated electrons},
author = {Michael Potthoff},
journal= {arXiv preprint arXiv:cond-mat/0301137},
year = {2009}
}
Comments
8 pages, 5 figures