Exact renormalization group and Phi-derivable approximations
High Energy Physics - Phenomenology
2011-03-07 v1 Other Condensed Matter
High Energy Physics - Theory
Abstract
We show that the so-called Phi-derivable approximations can be combined with the exact renormalization group to provide efficient non-perturbative approximation schemes. On the one hand, the Phi-derivable approximations allow for a simple truncation of the infinite hierarchy of the renormalization group flow equations. On the other hand, the flow equations turn the non linear equations that derive from the Phi-derivable approximations into an initial value problem, offering new practical ways to solve these equations.
Cite
@article{arxiv.1009.6048,
title = {Exact renormalization group and Phi-derivable approximations},
author = {Jean-Paul Blaizot and Jan M. Pawlowski and Urko Reinosa},
journal= {arXiv preprint arXiv:1009.6048},
year = {2011}
}
Comments
15 pages, 2 figures