2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/188200We study de spectrum of primordial fluctuations and the scale dependence of the inflaton spectral index due to self-interactions of the field. We compute the spectrum of fluctuations by applying nonequilibrium renormalization group techniques.6 pages, 1 figure, submitted to J. Phys. AHigh Energy Physics - Phenomenologytext