Spacetimes with vector distortion: Inflation from generalised Weyl geometry
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 756, 400-404 p.Article in journal (Refereed) PublishedText
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.
IdentifiersURN: urn:nbn:se:kth:diva-186554DOI: 10.1016/j.physletb.2016.03.047ISI: 000373569200063ScopusID: 2-s2.0-84962299455OAI: oai:DiVA.org:kth-186554DiVA: diva2:927975
QC 201605132016-05-132016-05-132016-05-16Bibliographically approved