Universality in the exact renormalization group: comparison to perturbation theory
High Energy Physics - Theory
2023-09-08 v3 Statistical Mechanics
Abstract
Various formulations of the exact renormalization group can be compared in the perturbative domain, in which we have reliable expressions for regularization-independent (universal) quantities. We consider the renormalization of the theory in three dimensions and make a comparison between the sharp-cutoff regularization method and other more recent methods. They all give good results, which only differ by small non-universal terms.
Keywords
Cite
@article{arxiv.2304.00597,
title = {Universality in the exact renormalization group: comparison to perturbation theory},
author = {Jose Gaite},
journal= {arXiv preprint arXiv:2304.00597},
year = {2023}
}
Comments
11 pages; new case studied, references added; normalization error corrected, with significant changes