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

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

2009-06-09

arxiv.org/abs/0906.1789v2

JCAP 0910:020,2009

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 5 figures, version published in JCAP

Scientific paper

10.1088/1475-7516/2009/10/020

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.

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