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

TL;DR

This paper explores how non-minimal coupling in scalar-tensor gravity models affects deviations from de Sitter expansion during cosmological inflation, providing exact equations for dynamics and perturbations.

Contribution

It introduces a new approach to analyze deviations from de Sitter expansion in generalized scalar-tensor gravity, deriving exact cosmological equations and perturbation parameters.

Findings

Derived exact equations for cosmological dynamics.

Analyzed perturbation parameters in non-minimal coupling models.

Provided insights into inflationary deviations from de Sitter space.

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.