Quadratic curvature corrections to stringy effective actions and the absence of de Sitter vacua
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2022)012
Abstract: Abstract We investigate the combined effect of fluxes and higher-order curvature corrections, in the form of the Gauss-Bonnet term, on the existence of de Sitter vacua in a heterotic string inspired framework, compactified on spheres… read more here.
Keywords: curvature corrections; quadratic curvature; curvature; sitter vacua ... See more keywords
Higher-curvature corrections and tensor modes
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.103.043515
Abstract: Higher-curvature corrections to the effective gravitational action may leave signatures in the spectrum of primordial tensor perturbations if the inflationary energy scale is sufficiently high. In this paper, we further investigate the effects of a… read more here.
Keywords: higher curvature; curvature corrections; curvature; tensor modes ... See more keywords