Non-singular cosmology in a model of non-relativistic gravity

By Yi-Fu Cai, Emmanuel N. Saridakis. 2009

173 citations recorded by the source corpus.

We present a model of non-relativistic gravitational theory which is power-counting renormalizable in 3+1 dimensional spacetime. When applied to cosmology, the relativity-violation terms lead to a dark radiation component, which can give rise to a bounce if dark radiation possesses negative energy density. Additionally, we investigate a cyclic extension of the non-singular cosmology in which the universe undergoes contractions and expansions periodically. In both scenarios the background theory is well defined at the quantum level.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/ffcb1b4ed8d47648e7a73fee20916936bcc9d96e

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Citations in the corpus

Exploring bouncing cosmologies with cosmological surveys (2014, background): “They appear in many theoretical settings where either the gravitational sector is modified as in Hor̆ava gravity [56–58], non-relativistic gravitational action[59], torsion gravity [60, 61], Lagrange-multiplier gravity [62, 63], nonlinear massive gravity [64] and non-local gravity [65], or by making”
Modified Gravity and Cosmology (2011, background): “This is often at the root of much of the interesting cosmology that has subsequently arisen, including (i) a scale invariant spectrum of cosmological perturbations, without early time acceleration [925, 284], (ii) cosmological bounces [179, 234, 522, 854, 351], (iii) dark matter as an integration co”
Hořava–Lifshitz dark energy (2009, background): “, 45, 46], the phase-space behavior [47, 48, 49, 50, 51], the gravitational wave production [52, 53, 54, 55, 56, 57], the perturbation spectrum [58, 59, 60, 61, 62, 63, 64, 65, 66], the matter bounce [67, 68, 69, 70, 71, 72], the black hole properties [73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84,”
f(T) teleparallel gravity and cosmology (2015, methodology): “Such scenarios have been constructed through various approaches to modified gravity, such as the Pre-Big Bang [374, 375] and Ekpyrotic [376, 377] models, gravitational actions with higher order corrections [378], the gravitational Lagrangian modified as in Hor̆ava gravity [379–381], non-relativistic”