Scale invariance, unimodular gravity and dark energy

Details Scale invariance, unimodular gravity and dark energy Scale invariance, unimodular gravity and dark energy

2008-09-19

arxiv.org/abs/0809.3395v2

Phys.Lett.B671:187-192,2009

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 1 figure, replaced with journal version

Scientific paper

10.1016/j.physletb.2008.11.054

We demonstrate that the combination of the ideas of unimodular gravity, scale invariance, and the existence of an exactly massless dilaton leads to the evolution of the universe supported by present observations: inflation in the past, followed by the radiation and matter dominated stages and accelerated expansion at present. All mass scales in this type of theories come from one and the same source.

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