2013/07/31 by Elias Kiritsis · 42 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Connection (principal bundle) #Cosmology #Cosmology and Gravitation Theories #Flatness (cosmology) #Holography #Inflation (cosmology) #Inflaton #Naturalness #Quantum Chromodynamics and Particle Interactions #Scalar (mathematics) #Spectral index #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2013/11/011
published in Journal of Cosmology and Astroparticle Physics 2013(11), 011 (Institute of Physics) · 17 pages, LateX. (v2) References added, comments on naturalness and generalisations added
arxiv created 2013/07/31 · openalex publication_date 2013/11/07 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Holographic RG flows in some cases are known to be related to cosmological solutions. In this paper another example of such correspondence is provided. Holographic RG flows giving rise to asymptotically-free \β-functions have been analyzed in connection with holographic models of QCD. They are shown upon Wick rotation to provide a large class of inflationary models with logarithmically soft inflaton potentials. The scalar spectral index is universal and depends only on the number of e-foldings. The ratio of tensor to scalar power depends on the single extra real parameter that defines this class of models. The Starobinsky inflationary model as well as the recently proposed models of T-inflation are members of this class. The holographic setup gives a completely new (and contrasting) view to the stability and other problems of such inflationary models.