SPACE, TIME AND FUNDAMENTAL INTERACTIONS

INVESTIGATION OF THE CHIRAL COSMOLOGICAL MODEL OF \(f (R, \square R)\) GRAVITY

Chervon S.V., Fomin I.V., Chaadaeva T.I.

We study modified \(f (R, \square R)\) gravity which can be reduced to the chiral cosmological model of the special type. Various types of cosmological solutions are considered based on exact analytical solutions, the slow-roll approximation, the superpotential method, the inclusion of additional material fields and reduction multi-field model to single-field one as well. Thus, this paper presents topical methods for analyzing cosmological models based on an effective multi-field interpretation of the proposed modified gravity.