Accelerating universe as a result of an adjustment mechanism

Abstract

In this essay we propose that the theory of gravity's vacuum is described by a de Sitter geometry. Under this assumption we consider an adjustment mechanism able to screen any value of the vacuum energy of the matter fields. We discuss the most general scalar-tensor cosmological models with second order equations of motion that have a fixed de Sitter critical point for any kind of material content. These models give rise to interesting cosmological evolutions that we shall discuss.

7 pages, 2 figures. Essay awarded honorable mention in the Gravity Research Foundation essay competition 2015

References in corpus (4)

• Covariant Galileon
• Avoiding Dark Energy with 1/R Modifications of Gravity
• Horndeski theories self-tuning to a de Sitter vacuum
• The cosmology of the Fab-Four

Cited by in corpus (2)

• Cosmological models in modified gravity theories with extended nonminimal derivative couplings
• A Review on the Cosmology of the de Sitter Horndeski Models