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Spacetimes with vector distortion: Inflation from generalised Weyl geometry
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-9403-8565
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 756, 400-404 p.Article in journal (Refereed) PublishedText
Abstract [en]

Spacetime with general linear vector distortion is introduced. Thus, the torsion and the nonmetricity of the affine connection are assumed to be proportional to a vector field (and not its derivatives). The resulting two-parameter family of non-Riemannian geometries generalises the conformal Weyl geometry and some other interesting special cases. Taking into account the leading nonlinear correction to the Einstein-Hilbert action results uniquely in the one-parameter extension of the Starobinsky inflation known as the alpha-attractor. The most general quadratic curvature action introduces, in addition to the canonical vector kinetic term, novel ghost-free vector-tensor interactions.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 756, 400-404 p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-186554DOI: 10.1016/j.physletb.2016.03.047ISI: 000373569200063ScopusID: 2-s2.0-84962299455OAI: diva2:927975

QC 20160513

Available from: 2016-05-13 Created: 2016-05-13 Last updated: 2016-05-16Bibliographically approved

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Koivisto, Tomi S.
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Nordic Institute for Theoretical Physics NORDITA
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