Solutions of renormalization-group flow equations with full momentum dependence.
We demonstrate the power of a recently proposed approximation scheme for the nonperturbative renormalization group that gives access to correlation functions over their full momentum range. We solve numerically the leading-order flow equations obtained within this scheme and compute the two-point functions of the O(N) theories at criticality, in two and three dimensions. Excellent results are obtained for both universal and nonuniversal quantities at modest numerical cost.
Benitez
F
F
Instituto de Fìsica, Faculdad de Ingeniería, Universidade de la República, 11000 Montevideo, Uruguay.
Blaizot
J-P
JP
Chaté
H
H
Delamotte
B
B
Méndez-Galain
R
R
Wschebor
N
N