Conserving approximations vs Two-Particle Self-Consistent Approach
Strongly Correlated Electrons
2007-05-23 v2 Superconductivity
Abstract
The conserving approximation scheme to many-body problems was developed by Kadanoff and Baym using the functional-derivative approach. Another approach for the Hubbard model also satisfies conservation laws, but in addition it satisfies the Pauli principle and a number of sum rules. A concise formal derivation of that approach, using functional derivatives, is given in this conference paper to highlight formal analogies and differences with conserving approximations.
Cite
@article{arxiv.cond-mat/0110130,
title = {Conserving approximations vs Two-Particle Self-Consistent Approach},
author = {S. Allen and A. -M. S. Tremblay and Y. M. Vilk},
journal= {arXiv preprint arXiv:cond-mat/0110130},
year = {2007}
}
Comments
RevTex, corrected typos, updated references, as published version