Interactions of some fluids with dark energy in f(T) theory

TL;DR

This paper explores how dark energy interacts with various fluids within the f(T) gravity framework, revealing effects like phantom phases and cosmological constant dominance, which influence the universe's evolution.

Contribution

It introduces the study of dark energy interactions with different fluids in f(T) gravity, highlighting new dynamical behaviors and cosmological implications.

Findings

Interaction with baryonic matter leads to decay of matter energy density.

Interaction with Van Der Waals fluid suggests a transition into a phantom phase.

Interaction with Chaplygin gas results in a universe dominated by a cosmological constant.

Abstract

We investigate the interaction of the dark energy with some fluids filling the universe in the framework of $f(T)$ theory, where $T$ denotes the torsion scalar, searching for the associated gravitational actions. Dark energy is assumed to be of gravitational origin. The interaction of dark energy and baryonic matter is considered resulting in a decay of the energy density of the ordinary matter, where universe appears as driven by cosmological constant. Furthermore we consider the interaction of dark energy with Van Der Waals fluid and in this regard the universe is seemed plunging into a phantom phase. Finally, the interaction of the dark energy with Chaplygin gas is studied, leading to a universe dominated by the cosmological constant.