Why Self-Consistent Diagrammatic Perturbation Theory is `just' Perturbation Theory
Condensed Matter
2007-05-23 v1
Abstract
In this short write-up we argue that self-consistent diagrammatic perturbation theory(i.e. Feynman diagrams) for the one-particle Green function is unable to capture some important qualitative features no matter how self-consistently the Green functions are obtained. This write-up is intended to highlight the short-comings of perturbation theory and also tout the advantages of the sea-boson technique(hep-th/9706006).
Keywords
Cite
@article{arxiv.cond-mat/9908269,
title = {Why Self-Consistent Diagrammatic Perturbation Theory is `just' Perturbation Theory},
author = {Girish S. Setlur},
journal= {arXiv preprint arXiv:cond-mat/9908269},
year = {2007}
}
Comments
3 pages, RevTex