Speaker
Sergey Sushkov
(Kazan Federal University)
Description
We consider cosmological perturbations in the theory of gravity with nonminimal kinetic coupling. The Lagrangian of the theory contains the term $\zeta G^{ij}\phi_{,i}\phi_{,j}$, and represents the particular example of a general Horndeski Lagrangian, which results in second-order field equations. We derive a complete set of equations for scalar and tensor pertubations. The scalar and tensor modes are analyzed in detail. It is shown that their behavior inside the Hubble horizon differs cardinally from the analogous behavior of scalar and tensor modes in Friedmann cosmology.
Primary author
Sergey Sushkov
(Kazan Federal University)
