Large-N expansion based on the Hubbard-operator path integral representation and its application to the $t-J$ model
Strongly Correlated Electrons
2009-11-07 v1
Abstract
In the present work we have developed a large-N expansion for the model based on the path integral formulation for Hubbard-operators. Our large-N expansion formulation contains diagrammatic rules, in which the propagators and vertex are written in term of Hubbard operators. Using our large-N formulation we have calculated, for J=0, the renormalized boson propagator. We also have calculated the spin-spin and charge-charge correlation functions to leading order 1/N. We have compared our diagram technique and results with the existing ones in the literature.
Cite
@article{arxiv.cond-mat/0203258,
title = {Large-N expansion based on the Hubbard-operator path integral representation and its application to the $t-J$ model},
author = {Adriana Foussats and Andres Greco},
journal= {arXiv preprint arXiv:cond-mat/0203258},
year = {2009}
}
Comments
6 pages, 3 figures, Phys.Rev.B (in press)