On multifield inflation, adiabaticity and the speed of sound of the curvature perturbations

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On multifield inflation, adiabaticity and the speed of sound of the curvature perturbations

Type: Doctoral Thesis
Title: On multifield inflation, adiabaticity and the speed of sound of the curvature perturbations
Author: Atal, Vicente
Publisher: Leiden Institute of Physics (LION), Faculty of Science, Leiden University
Issue Date: 2016-03-08
Keywords: Cosmology
Inflation
Abstract: In this thesis we study some aspects of the very early Universe. We focus on the period of inflation, and show how the presence of many fields during this period can affect its low energy description. We focus on the predictions for the two and three point correlation functions of the curvature perturbations, in the case in which apart from the inflaton field there is a very heavy isocurvature field participating in the dynamics. We also treat briefly the case in which the isocurvature field is light, in particular applied to the case of so-called natural inflation.
Description: Promotor: A. Achúcarro, Co-Promotor: G.A. Palma
With Summary in Dutch
Faculty: Faculteit der Wiskunde en Natuurwetenschappen
Citation: Atal, V., 2016, Doctoral Thesis, Leiden University
Series/Report no.: Casimir PhD Series;2016-5
ISBN: 9789085932499
Handle: http://hdl.handle.net/1887/38478
 

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