22-26 October 2018
Hotel Intourist Kolomenskoye 4*
Europe/Moscow timezone

Cosmological perturbations during the kinetic inflationary epoch in the Horndeski theory

23 Oct 2018, 18:05
Moskvorechye 1 hall (Hotel Intourist Kolomenskoye 4*)

Moskvorechye 1 hall

Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Plenary/section talk Gravitation and Cosmology


Sergey Sushkov (Kazan Federal University)


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)

Presentation Materials

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