Spacetimes with vector distortion: Inflation from generalised Weyl geometry
| Autor: | Jose Beltrán Jiménez, Tomi S. Koivisto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physics Letters B, Vol 756, Iss C, Pp 400-404 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0370-2693 1873-2445 |
| DOI: | 10.1016/j.physletb.2016.03.047 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|
Full Text from ScienceDirect