On some physical aspects of isotropic cosmology in Riemann-Cartan spacetime

TL;DR

This paper explores isotropic cosmology within Riemann-Cartan spacetime using Poincaré gauge theory, deriving cosmological equations and discussing implications for dark energy and singularities.

Contribution

It provides a general framework for isotropic cosmology in Riemann-Cartan spacetime, including derivation of cosmological and torsion equations for the most general models.

Findings

Discussion on potential solutions to dark energy problem.

Analysis of cosmological singularity issues.

Derivation of equations for torsion functions in homogeneous isotropic models.

Abstract

Isotropic cosmology built in the framework of the Poincar\'e gauge theory of gravity based on sufficiently general expression of gravitational Lagrangian is considered. The derivation of cosmological equations and equations for torsion functions in the case of the most general homogeneous isotropic models is given. Physical aspects of isotropic cosmology connected with possible solution of dark energy problem and problem of cosmological singularity are discussed.