2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56086It is shown in the framework of the N-component scalar model that the saddle point structure may generate non-trivial renormalization group flow. The spinodal phase separation can be described in this manner and a flat action is found as an exact result which is valid up to any order of the loop expansion. The correlation function is computed in a mean-field approximation.16 pages, 1 figureHigh Energy Physics - Theorytext