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- W567791845 abstract "To completely describe the inflationary era in the early universe is an extremely ambitioustask. The main reason is that its dynamics are highly sensitive to ultraviolet physics,making the knowledge of inflation dependent on our ignorance of what is happening atthese energy scales. This is not necessarily a weakness of inflation as a paradigm; it isultimately its most interesting characteristic. Accepting this lack of control on the detailsof inflationary dynamics brings observational cosmology and the search for an ultravioletcomplete theory of gravity together.In this thesis, this duality is explored with the aim of making steps towards an efficientway of studying inflation and its predictions and signatures. This challenge is twofold;first, since fundamental theories are far from being able to explicitly determine the earlyuniverse physics, the construction of approximate toy models is unavoidable. For thisreason, I identify the key issues for the building of a realistic inflation model, in particularthe delicate flatness of the inflaton potential, the strong possibility of multifield dynamicsand the necessity of a viable reheating, and in the light of these analyze how best toapproximate an ultraviolet complete inflation. For this analysis, two different classes ofcase studies are presented: inflation in the brane picture and in a holography inspiredscenario.On the other hand, since any toy model of an ultraviolet complete inflation necessarilypresents a high level of complexity, the computation of predictions for observables is nottrivial. For this purpose, I develop numerical tools that manage to compute these parameters efficiently and with a high level of accuracy for a broad range of inflation classes with more than one active field. For each case study, I determine the impact of the inclusion of microphysics contributions in the resulting observational signatures and confront them with data." @default.
- W567791845 created "2016-06-24" @default.
- W567791845 creator A5052906953 @default.
- W567791845 date "2013-03-14" @default.
- W567791845 modified "2023-09-27" @default.
- W567791845 title "Ultraviolet complete inflation : looking at inflation from fundamental physics" @default.
- W567791845 hasPublicationYear "2013" @default.
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