Attraktorimalleja kosmisessa inflaatiossa

Tässä Pro Gradu -tutkielmassa on esitetty kosmisen infaatioteorian erilaisia attraktorimalleja, jotka ajavat maailmankaikkeuden infaatioon, eli eksponentiaaliseen laajentumiseen, lähtöarvoista riippumatta. Tutkielmassa esitellään perinteinen slow-roll-malli, ja esimerkkeinä tutkimuksen kohteena olev...

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Main Author: Harju, Aleksi
Other Authors: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Fysiikan laitos, Department of Physics, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:fin
Published: 2021
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/76776
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author Harju, Aleksi
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_facet Harju, Aleksi Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä Harju, Aleksi Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_sort Harju, Aleksi
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description Tässä Pro Gradu -tutkielmassa on esitetty kosmisen infaatioteorian erilaisia attraktorimalleja, jotka ajavat maailmankaikkeuden infaatioon, eli eksponentiaaliseen laajentumiseen, lähtöarvoista riippumatta. Tutkielmassa esitellään perinteinen slow-roll-malli, ja esimerkkeinä tutkimuksen kohteena olevista muista malleista fast-roll-malli, constant-roll-malli, ja α-attraktorimallien luokka. Fast-roll-mallin on jo aiemmin todettu olevan kykenemätön yksinään tuottamaan meidän maailmankaikkeutemme varhaisia häiriöitä, mutta esimerkiksi α-attraktorit tuottavat hyvin havaittavaan dataan sopivia ennusteita. In this master’s thesis I have introduced different attractor models related to cosmic infationary theory, which drive the universe to the infationary epoch, in which the universe expands exponentially, despite the initial conditions. In this thesis I introduce the slow-roll model, and as examples of other models under investigation, fast-roll model, constant-roll model, and a specific class of attractor models called α-attractor models. I note that the Fast-roll model in itself has already been declared not to be capable of producing the early cosmic perturbations, but for example the α-attractor models seem to produce predictions that seem to fit the observable data well.
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spellingShingle Harju, Aleksi Attraktorimalleja kosmisessa inflaatiossa varhainen maailmankaikkeus rakenteen synty Fysiikka Physics 4021 inflaatio kosmologia maailmankaikkeus kosminen inflaatio maailmankaikkeuden synty
title Attraktorimalleja kosmisessa inflaatiossa
title_full Attraktorimalleja kosmisessa inflaatiossa
title_fullStr Attraktorimalleja kosmisessa inflaatiossa Attraktorimalleja kosmisessa inflaatiossa
title_full_unstemmed Attraktorimalleja kosmisessa inflaatiossa Attraktorimalleja kosmisessa inflaatiossa
title_short Attraktorimalleja kosmisessa inflaatiossa
title_sort attraktorimalleja kosmisessa inflaatiossa
title_txtP Attraktorimalleja kosmisessa inflaatiossa
topic varhainen maailmankaikkeus rakenteen synty Fysiikka Physics 4021 inflaatio kosmologia maailmankaikkeus kosminen inflaatio maailmankaikkeuden synty
topic_facet 4021 Fysiikka Physics inflaatio kosminen inflaatio kosmologia maailmankaikkeuden synty maailmankaikkeus rakenteen synty varhainen maailmankaikkeus
url https://jyx.jyu.fi/handle/123456789/76776 http://www.urn.fi/URN:NBN:fi:jyu-202106223969
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