Amplification mechanisms of inflationary spectra in induced gravity

Hapca, Oana Mariana (2022) Amplification mechanisms of inflationary spectra in induced gravity. [Laurea magistrale], Università di Bologna, Corso di Studio in Physics [LM-DM270], Documento full-text non disponibile
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Inflation is the primordial stage of accelerated expansion of the Universe which solves the issues of the initial conditions of a decelerating Universe (horizon, flatness and entropy problems). Moreover, it is supposed that quantum fluctuations originated during the first moments after the Big Bang gave rise to the formation of galaxies and other structures of the Universe when inflation ends. Among these structures also primordial black holes (PBHs) may have been generated. The interest in PBHs relies on their possible connection with dark matter: they could constitute a portion or even the whole dark matter content of our Universe.\\ In this work we consider inflation in the Induced Gravity (IR) context and study possible mechanisms of amplification of the curvature perturbations generated during the cosmic acceleration. In particular we consider the possibility of a period of Constant Roll (CR). Starting from the previous work of Starobinsky et al. Our final purpose is to analyse the power spectrum of the scalar perturbations and to find in which conditions there is an enhancement of the power spectrum possibly leading to PBHs formation.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Hapca, Oana Mariana
Relatore della tesi
Correlatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
Cosmology,Induced Gravity,Cosmological Perturbations
Data di discussione della Tesi
15 Luglio 2022

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