Dynamical variational principles for strongly correlated electron systems
Strongly Correlated Electrons
2015-06-25 v1
Abstract
The self-energy-functional approach (SFA) is discussed in the context of different variational principles for strongly correlated electron systems. Formal analogies between static and dynamical variational approaches, different types of approximation strategies and the relations to density-functional and dynamical mean-field theory are emphasized. The discussion elucidates the strengths of the SFA in the construction of new non-perturbative approximations but also the limitations of the approach and thereby opens up future perspectives.
Keywords
Cite
@article{arxiv.cond-mat/0503715,
title = {Dynamical variational principles for strongly correlated electron systems},
author = {Michael Potthoff},
journal= {arXiv preprint arXiv:cond-mat/0503715},
year = {2015}
}
Comments
12 pages, 1 eps figures included, Adv. Solid State Phys. (in press)