Covariant Horava-like and mimetic Horndeski gravity: cosmological solutions and perturbations

Guido Cognola, Ratbay Myrzakulov, Lorenzo Sebastiani +2

We consider a variant of the Nojiri-Odintsov covariant Horava-like gravitational model, where diffeomorphism invariance is broken dynamically via a non-standard coupling to a perfe…