The Origin of the Large-Scale Structure in the Universe
Автор:Yeinzon Rodriguez Garcia Год: 2010 Издание:LAP Lambert Academic Publishing Страниц: 136 ISBN: 9783838324142 This thesis reviews some theoretical and statistical aspects of the origin of the large-scale structure in the Universe in view of the two most widely known and accepted scenarios: the inflaton and the curvaton scenarios. Among the theoretical aspects, the author points out the impossibility of having a low inflationary energy scale in the simplest curvaton model. A couple of modifications to the simplest setup are explored so that low scale inflation is possible to attain with the Hubble parameter a few Hubble times after horizon exit being as low as 1 TeV. Among the statistical aspects, the author studies the bispectrum of the primordial curvature perturbation whose normalisation fNL gives information about the level of primordial non-gaussianity. The ?N formalism turns out to be a powerful technique to compute fNL in multi-component slow-roll inflation as the knowledge of the evolution of some family of unperturbed universes is the only requirement. The author presents for the...
