P. Martín-Moruno, N. J. Nunes, F. S. N. Lobo
Abstract
We consider Horndeski cosmological models, with a minisuperspace Lagrangian linear in the field derivative, that are able to screen any vacuum energy and material content leading to a spatially flat de Sitter vacuum fixed by the theory itself. Furthermore, we investigate particular models with a cosmic evolution independent of the material content and use them to understand the general characteristics of this framework. We also consider more realistic models, which we denote the "term-by-term" and "tripod" models, focusing attention on cases in which the critical point is indeed an attractor solution and the cosmological history is of particular interest.
Keywords
modified gravity, dark energy theory
Journal of Cosmology and Astroparticle Physics
Volume 5, Page 33
2015 May
