De Sitter and power-law solutions in some models of modified gravity
Yi Zhong, Emilio Elizalde
TL;DR
This paper explores de Sitter and power-law cosmological solutions in extended models of Lovelock Brans-Dicke and mimetic gravity, incorporating non-local and Gauss-Bonnet terms to better describe universe evolution.
Contribution
It introduces new cosmological solutions in modified gravity models with added non-local and Gauss-Bonnet terms, expanding the theoretical framework.
Findings
De Sitter solutions found in both models.
Power-law solutions obtained in extended theories.
Potential for improved universe evolution modeling.
Abstract
Inspired by some recent works of Lovelock Brans-Dicke gravity and mimetic gravity, cosmology solutions in extensions of these two modified gravities are investigated. A non-local term is added to the Lovelock Brans-Dicke action and Gauss-Bonnet terms to the mimetic action,correspondingly. De Sitter and power scale factor solutions are then obtained in both theories. They can provide natural new approaches to a more accurate description of the unverse evolution.
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