Eur. Phys. J. C (2018) 78: 918
https://doi.org/10.1140/epjc/s10052-018-6409-5

Regular Article - Theoretical Physics

Non-minimal coupling influence on the deviation from de Sitter cosmological expansion

¹ Bauman Moscow State Technical University, 2nd Baumanskaya Street, 5, Moscow, 105005, Russia
² Ulyanovsk State Pedagogical University, Lenin’s Square, B. 4/5, Ulyanovsk, 432071, Russia
³ Kazan Federal University, Kremlevskaya Street, 18, Kazan, 420008, Russia

^* e-mail: chervon.sergey@gmail.com

Received: 19 March 2018
Accepted: 23 October 2018
Published online: 12 November 2018

Abstract

We investigate the models of cosmological inflation in generalized scalar–tensor gravity, which we consider as a source of deviation from de Sitter dynamics in the case of GR. Within the framework of the proposed approach, the exact equations of cosmological dynamics and parameters of cosmological perturbations are obtained.