Deformed general relativity and scalar-tensor models
arXiv:1806.06791 · doi:10.1088/1361-6382/aae442
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.
20 pages, 4 figures, authors' accepted manuscript