Attracted to de Sitter: cosmology of the linear Horndeski models - INSPIRE

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Attracted to de Sitter: cosmology of the linear Horndeski models

Feb 19, 2015

25 pages

Published in:

JCAP 05 (2015) 033

Published: May 19, 2015

e-Print:

1502.05878 [gr-qc]

DOI:

10.1088/1475-7516/2015/05/033

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Abstract: (IOP)

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.

Note:

V1: 25 pages, 14 figures. V2: 5 references added, minor clarifications added. This version accepted for publication in JCAP

vacuum state: energy
cosmological model
de Sitter
critical phenomena
minisuperspace
attractor
gravitation: model

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