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Modified Gravity with Vector Distortion and Cosmological Applications
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 2
2017 (English)In: Universe, ISSN 2218-1997, Vol. 3, no 2, 47Article in journal (Refereed) Published
Abstract [en]

We briefly review the basics of Weyl geometry and its natural extension by a general linear distortion of the metric connection by a vector field. A special class of the connections has torsion but retains the Weyl's semi-metricity condition. We present ghost-free gravitational theories in this geometrical setup and highlight their possible cosmological applications, such as new self-tuning solutions and new bouncing solutions found in the quadratic-curvature theories. The vector distortion can mimic the cosmological effects of dark matter.

Place, publisher, year, edition, pages
2017. Vol. 3, no 2, 47
Keyword [en]
modified gravity, Weyl geometry, cosmology
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-145232DOI: 10.3390/universe3020047ISI: 000404620300020OAI: oai:DiVA.org:su-145232DiVA: diva2:1128759
Available from: 2017-07-28 Created: 2017-07-28 Last updated: 2017-07-28Bibliographically approved

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Koivisto, Tomi S.
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