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Inflation in f (R, phi)-theories and mimetic gravity scenario
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Niels Bohr International Academy and Discovery Center, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, Copenhagen Ø, Denmark.
2015 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 75, no 9, 444Article in journal (Refereed) Published
Abstract [en]

We investigate inflation within f (R, phi)-theories, where a dynamical scalar field is coupled to gravity. A class of models which can support early-time acceleration with the emerging of an effective cosmological constant at high curvature is studied. The dynamics of the field allow for exit from inflation leading to the correct amount of inflation in agreement with cosmological data. Furthermore, the spectral index and tensor-to-scalar ratio of the models are carefully analyzed. A generalization of the theory to incorporate dark matter in the context of mimetic gravity, and further extensions of the latter, are also discussed.

Place, publisher, year, edition, pages
2015. Vol. 75, no 9, 444
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-175491DOI: 10.1140/epjc/s10052-015-3672-6ISI: 000361807400001ScopusID: 2-s2.0-84942418948OAI: diva2:862519

QC 20151022

Available from: 2015-10-22 Created: 2015-10-16 Last updated: 2015-10-22Bibliographically approved

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Vagnozzi, Sunny
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