The Chiral Cosmological Model with Dark Energy and Dark Matter

Nonlinear sigma models with the potential of interactions (chiral cosmological models) are applied widely for description of various epochs of Universe evolution. For example, by considering an inflationary epoch, the essential progress in understanding of the essence of the phenomenon was achieved due to method of exact solutions construction for inflation. Obtained exact solutions are considered as background ones when cosmological perturbations are studied. However, the application of exact solutions construction method to modern Universe with dark energy and dark matter domination over radiation and baryonic matter, faces with considerable difficulties. Therefore one of the possibilities to overcome this difficulties is to investigate evolutionary behavior of kinetic interaction of the scalar fields, describing dark energy, considering the behavior of chiral metric components as a function of a scalar factor. In this way it becomes possible to describe both dark energy and dark matter based on special properties of sigma model inner space metric.

cosmological model, sigma model, dark energy