Work

Deformed general relativity and scalar–tensor models

Year: 2018

Type: article

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.

Source: Classical and Quantum Gravity

DOI: 10.1088/1361-6382/aae442

Authors: Rhiannon Cuttell, Mairi Sakellariadou

Institutions: University of London, King's College London

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Science and Technology Facilities Council

Awards: G1643540916, Fundamental Physics from the Planck Scale to the LHC