Universality in the Exact Renormalization Group: Comparison to Perturbation Theory

Author:

Gaite José1ORCID

Affiliation:

1. Applied Physics Department, ETSIAE, Universidad Politécnica de Madrid, E-28040 Madrid, Spain

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 λϕ4 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.

Publisher

MDPI AG

Subject

General Physics and Astronomy

Reference32 articles.

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