The Impact of Ultraviolet Regularization on the Spectrum of Curvature Perturbations During Inflation

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dc.creatorFinelli, F.
dc.creatorMarozzi, G.
dc.creatorVacca, G. P.
dc.creatorVenturi, G.
dc.date2007-07-10
dc.date.accessioned2026-07-07T11:41:26Z
dc.date.available2026-07-07T11:41:26Z
dc.descriptionInflationary predictions based on the linear theory of cosmological perturbations are related to the two point function of a (second quantized) real scalar free field during the accelerated stage. Such a two point function is finite, in contrast with its coincidence limit, which is divergent due to the ultraviolet divergences proper of field theory. We therefore argue that predictions of most of the inflationary models do not necessarily need a regularization scheme to leading order, i.e. tree level, which is required instead for non-linear corrections or calculations involving the energy-momentum tensor. We also discuss unpleasant features of the "would be" regularized spectrum obtained using the traditional fourth order adiabatic subtraction.
dc.description7 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0707.1416
dc.identifierhttp://arxiv.org/abs/0707.1416
dc.identifierPhys.Rev.D76:103528,2007
dc.identifierdoi:10.1103/PhysRevD.76.103528
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200537
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.titleThe Impact of Ultraviolet Regularization on the Spectrum of Curvature Perturbations During Inflation
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