Gozzo, Stefano (2018) Modelli di inflazione cosmica: eliminazione di coincidenze nella dinamica di Slow-Roll. [Laurea triennale]
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The main purpose of this Thesis is to review and re-derive some main basic results for the dynamical systems governing inflation, the accelerated expansion taking place in the early Universe. The simplest way to achieve such an accelerated expansion of the Universe is through the classical "slow-roll" motion of a single-dynamical degree of freedom (e.g. provided by a scalar field). This allows to express the various predictions of the inflationary models in an expansion of suitable small "slow-roll parameters" (including the predictions for the generation of the quantum fluctuations of the system). The thesis will focus also on a generalisation to higher-order in the slow-roll dynamics of inflation, and on the implications on the inflationary models from the requirement of avoiding "cosmic" coincidences when interpreting current observational constraints.
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