Axioi Inflazioa

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Lan honetan axioi inflazio ereduaren dinamika ez-lineala ikertu dugu.Horretarako gauge eremuek infla-toiaren dinamikan eragiten duten erreakzioa aztertu dugu, eta tresna gisa lattice simulazioak erabili ditugu,askatasun gradu guztiak aldi berean eboluzionatuta.Gainera, lortutako emaitzak lehendik zeudenekin kon-paratu ditugu, non azken hauek hurbilketa analitikoak erabilita eta efektu inhomogeneoak ekidinda lortuakdiren. Inflazioaren dinamika era egokian deskribatzeko ekuazio inhomogeneoak bere osotasunean kontsideratubehar direla ondorioztatzen dugu, eta, beraz, beharrezkoa dela fenomenologiako muga eta emaitzak birkalkulatzea.
We have studied the non-linear dynamics of the axion-inflation model. The analysis is based on how the gaugefields backreact on the inflaton dynamics by using lattice simulations, where we simulate all degrees of freedomsimultaneously.In addition, we have compared the results from our lattice simulations with those that useanalytical approximations and where inhomogeneous effects are neglected. We conclude that in order to correctlydescribe the inflationary dynamics, it is crucial to consider the full inhomogeneous equations, and it is necessaryto recalculate the current bounds and constraints from the phenomenology.

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Kosmologia, unibertso goiztiarra, axioi inflazioa, dinamika ez-lineala, Cosmology, early universe, axion inflation, non-linear dynamics

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