De Sitter and power-law solutions in some models of modified gravity

Understand

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.