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.