On FRW Model in Conformal Teleparallel Gravity

TL;DR

This paper investigates an isotropic, homogeneous universe within conformal teleparallel gravity, deriving modified Friedmann equations that introduce a dark fluid responsible for cosmic acceleration.

Contribution

It applies conformal teleparallel gravity to cosmology, deriving new modified Friedmann equations and characterizing a dark fluid driving acceleration.

Findings

Derived behavior of scale factor, deceleration parameter, and energy density.

Identified a dark fluid with dark energy density and pressure causing acceleration.

Provided solutions to the field equations for an FRW universe in this gravity theory.

Abstract

In this paper we use the conformal teleparallel gravity to study an isotropic and homogeneous Universe which is settled by the FRW metric. We solve the field equations and we obtain the behavior of some cosmological parameters such as scale factor, deceleration parameter and the energy density of the perfect fluid which is the matter field of our model. The field equations, that we called modified Friedmann equations, allow us to define a dark fluid, with dark energy density and dark pressure, responsible for the acceleration in the Universe.