Starobinsky inflation beyond the leading order

Starobinsky inflation beyond the leading order

Bibliographic Details
Parent link:Physical Review D.— .— New York: American Physical Society
Vol. 110, iss. 6.— 2024.— Article number 063552, 8 p.
Main Author: Toyama Shunsuke
Corporate Author: National Research Tomsk Polytechnic University (570)
Other Authors: Ketov S. V. Sergey Vladimirovich
Summary:The Starobinsky model of cosmological inflation in four spacetime dimensions is reviewed with the emphasis on the impact of quantum gravity corrections. As a specific example of the quantum corrections, the Grisaru-Zanon quartic curvature terms in the gravitational effective action of closed superstrings are chosen. Those quartic curvature terms are compared to the Bel-Robinson tensor squared in a flat Friedman universe, and the upper bound on the effective string coupling constant is found by demanding unitarity (causality) and the absence of ghosts. It is found that the quantum corrections to the observables (tilts) of the cosmic microwave background radiation in the Starobinsky inflation may be of the same order of magnitude as the next-to-next-to-next classical contributions in the Starobinsky model with respect to the inverse powers of the e-folding number at the horizon crossing.
Текстовый файл
AM_Agreement
Published: 2024
Subjects:
труды учёных ТПУ
электронный ресурс
Online Access:https://doi.org/10.1103/PhysRevD.110.063552
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=676512

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