Non-Riemannian Volume Elements Dynamically Generate Inflation
Abstract
Our primary objective is the formulation of a plausible cosmological inflationary model entirely in terms of a pure modified gravity without any a priori matter couplings within the formalism of non-Riemannian spacetime volume elements. The non-Riemannian volume elements dynamically create in the physical Einstein frame a canonical scalar matter field and produce a non-trivial inflationary scalar potential with a large flat region and a low-lying stable minimum corresponding to the late universe stage. This dynamically generated inflationary potential is a substantial generalization of the classic Starobinsky potential. Our model predicts scalar power spectral index and tensor to scalar ratio in accordance with the available observational data.
Cite
@article{arxiv.1912.10412,
title = {Non-Riemannian Volume Elements Dynamically Generate Inflation},
author = {David Benisty and Eduardo Guendelman and Emil Nissimov and Svetlana Pacheva},
journal= {arXiv preprint arXiv:1912.10412},
year = {2019}
}
Comments
14 p., Invited talk at MPHYS10 - 10th Mathematical Physics Meeting, Belgrade, Sept. 2019, to be published in the proceedings, overlap with arXiv:1906.06691