Deformed general relativity and scalar-tensor models
General Relativity and Quantum Cosmology
2018-10-24 v2
Abstract
We calculate the most general action for a scalar-tensor model up to quadratic order in derivatives with deformed general covariance and non-minimal coupling. We demonstrate how different choices of the free functions recover specific well known scalar-tensor models. We look at the cosmological dynamics and find the general conditions for either inflation or a big bounce. Using this we present a novel non-minimally coupled scalar model which produces a bounce, and describe how to find similar models.
Cite
@article{arxiv.1806.06791,
title = {Deformed general relativity and scalar-tensor models},
author = {Rhiannon Cuttell and Mairi Sakellariadou},
journal= {arXiv preprint arXiv:1806.06791},
year = {2018}
}
Comments
20 pages, 4 figures, authors' accepted manuscript