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Chain inflation revisited
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2008 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, no 10, 012- p.Article in journal (Refereed) Published
Abstract [en]

This paper represents an in-depth treatment of the chain inflation scenario. We fully determine the evolution of the universe in the model, the conditions necessary in order to have a successful inflationary period, and the matching with the observational results regarding the cosmological perturbations. We study in great detail, and in general, the dynamics of the background, as well as the mechanism of generation of the perturbations. We also find an explicit formula for the spectrum of adiabatic perturbations. Our results prove that chain inflation is a viable model for solving the horizon, entropy and flatness problems of standard cosmology and for generating the right amount of adiabatic cosmological perturbations. The results are radically different from those found in previous works on the subject. Finally, we argue that there is a natural way to embed chain inflation into flux compactified string theory. We discuss the details of the implementation and how to fit observations.

Place, publisher, year, edition, pages
2008. no 10, 012- p.
Keyword [en]
cosmological perturbation theory, cosmological phase transitions, string theory and cosmology, inflation
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-107092DOI: 10.1088/1475-7516/2008/10/012ISI: 000260529800012OAI: oai:DiVA.org:uu-107092DiVA: diva2:227652
Available from: 2009-07-16 Created: 2009-07-16 Last updated: 2009-07-16Bibliographically approved

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