2018/06/30 by Rhiannon Cuttell, Mairi Sakellariadou · 3 citations
Physics and Astronomy · #Action (physics) #Black Holes and Theoretical Physics #Cosmological model #Cosmology and Gravitation Theories #Covariance #Effective action #General covariance #General relativity #Inflation (cosmology) #Noncommutative and Quantum Gravity Theories #Scalar (mathematics) #gr-qc
paper · pdf · open access · doi:10.1088/1361-6382/aae442
published in Classical and Quantum Gravity 35(22), 225005 (IOP Publishing) · 20 pages, 4 figures, authors' accepted manuscript
openalex created_date 2018/06/21 · openalex publication_date 2018/09/26 · arxiv created 2018/10/23 · arxiv updated 2018/10/24 · openalex updated_date 2026/08/05
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.