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Modified Gravity with Vector Distortion and Cosmological Applications

1
Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille 13288, France
2
Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden
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Author to whom correspondence should be addressed.
Academic Editors: Mariusz P. Dąbrowski, Manuel Krämer and Vincenzo Salzano
Universe 2017, 3(2), 47; https://doi.org/10.3390/universe3020047
Received: 7 April 2017 / Revised: 14 May 2017 / Accepted: 19 May 2017 / Published: 24 May 2017
(This article belongs to the Special Issue Varying Constants and Fundamental Cosmology)
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. View Full-Text
Keywords: modified gravity; Weyl geometry; cosmology modified gravity; Weyl geometry; cosmology
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MDPI and ACS Style

Beltrán Jiménez, J.; Koivisto, T.S. Modified Gravity with Vector Distortion and Cosmological Applications. Universe 2017, 3, 47. https://doi.org/10.3390/universe3020047

AMA Style

Beltrán Jiménez J, Koivisto TS. Modified Gravity with Vector Distortion and Cosmological Applications. Universe. 2017; 3(2):47. https://doi.org/10.3390/universe3020047

Chicago/Turabian Style

Beltrán Jiménez, Jose; Koivisto, Tomi S. 2017. "Modified Gravity with Vector Distortion and Cosmological Applications" Universe 3, no. 2: 47. https://doi.org/10.3390/universe3020047

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