Unified dark matter and dark energy description in a chiral cosmological model

TL;DR

This paper presents a unified model of dark matter and dark energy using a two-component chiral cosmological framework, reconstructing key functions to match observational data and comparing with the standard Lambda-CDM model.

Contribution

It introduces a novel approach to unify dark matter and dark energy through kinetic energy ansatzs in a chiral cosmological model, including a reconstruction method for model functions.

Findings

Reconstructed the chiral metric component $h_{22}$ for different cosmological epochs.

Reconstructed the potential $V$ for early and late inflation.

Compared the model's predictions with the $ ext{Lambda CDM}$ model.

Abstract

We show the way of dark matter and dark energy presentation via ansatzs on the kinetic energies of the fields in the two-component chiral cosmological model. To connect a kinetic interaction of dark matter and dark energy with observational data the reconstruction procedure for the chiral metric component $h_{22}$ and the potential of (self)interaction $V$ has been developed. The reconstruction of $h_{22}$ and $V$ for the early and later inflation have been performed. The proposed model is confronted to $\Lambda CDM$ model as well.