Attracted to de Sitter: cosmology of the linear Horndeski models
arXiv:1502.05878 · doi:10.1088/1475-7516/2015/05/033
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.
V1: 25 pages, 14 figures. V2: 5 references added, minor clarifications added. This version accepted for publication in JCAP
References in corpus (8)
- Resummation of Massive Gravity
- Covariant Galileon
- DBI and the Galileon reunited
- Degravitation of the Cosmological Constant and Graviton Width
- Cosmic Acceleration and the Helicity-0 Graviton
- Horndeski theories self-tuning to a de Sitter vacuum
- Massive gravity from bimetric gravity
- Fab 5: Noncanonical Kinetic Gravity, Self Tuning, and Cosmic Acceleration