Cosmology at the boundary of de Sitter using the dS/QFT correspondence

Abstract

Using the dS/QFT correspondence in the context of inflation allows for the study of interesting, otherwise inaccessible physics. In particular, by studying inflation via its dual field theory at the boundary of the de Sitter space, it may be possible to study a regime of strongly coupled gravity at early times. The purpose of this work is to completely express cosmological observables in terms of the free parameters of a dual field theory and to compare them with CMB data. In this way, constraints on the observational parameters constrains the validity of the strongly coupled inflation picture by imposing limits on the parameters of the field theory. The fit with data defines a limit for the consistency and validity of the approach taken and shows that, within this limit, the model is almost unconstrained, but quite predictive, producing power spectra of density perturbations extremely near scale invariance.

arXiv comment10 pages, 7 figures, minor changes to match published version

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• Holography for inflation using conformal perturbation theory
• From Planck data to Planck era: Observational tests of Holographic Cosmology
• Inflation and deformation of conformal field theory
• Renormalisation of IR divergences and holography in de Sitter
• Constraining holographic inflation with WMAP
• Constraining holographic cosmology using Planck data
• Holography for the very early Universe and the classic puzzles of Hot Big Bang cosmology
• Inflation as an Information Bottleneck - A strategy for identifying universality classes and making robust predictions
• Holographic cosmology solutions of problems with pre-inflationary cosmology