Two-Particle Self-Consistent method for the multi-orbital Hubbard model
Abstract
One of the most challenging problems in solid state systems is the microscopic analysis of electronic correlations. A paramount minimal model that encodes correlation effects is the Hubbard Hamiltonian, which -- albeit its simplicity -- is exactly solvable only in a few limiting cases and approximate many-body methods are required for its solution. In this review we present an overview on the non-perturbative Two-Particle Self-Consistent method (TPSC) which was originally introduced to describe the electronic properties of the single-band Hubbard model. We introduce here a detailed derivation of the multi-orbital generalization of TPSC and discuss particular features of the method on exemplary interacting models in comparison to dynamical mean-field theory results.
Cite
@article{arxiv.2008.08098,
title = {Two-Particle Self-Consistent method for the multi-orbital Hubbard model},
author = {Karim Zantout and Steffen Backes and Roser Valenti},
journal= {arXiv preprint arXiv:2008.08098},
year = {2022}
}
Comments
22 pages, 10 figures