# Phantom energy dominated universe as a transient stage in $f(R)$ cosmology

## TL;DR

This paper explores $f(R)$ gravity in anisotropic Bianchi type-I spacetime during a phantom energy era, revealing that phantom dominance is transient and the universe eventually returns to dark energy domination, with potential links to loop quantum cosmology.

## Contribution

It demonstrates that in $f(R)$ gravity, the phantom energy phase is temporary and the universe naturally transitions back to dark energy dominance, a novel insight into cosmic evolution.

## Key findings

- Phantom energy dominance is a transient stage in $f(R)$ cosmology.
- The universe re-enters dark energy domination after the phantom phase.
- The model suggests a possible connection to loop quantum cosmology.

## Abstract

The $f(R)$ theories of gravity are the most popular, simple and well succeeded extension of Einstein's General Relativity. They can account for some observational issues of standard cosmology with no need for evoking the dark sector of the universe. In the present letter we will investigate LRS Bianchi type-I space-time in $f(R)$ gravity theory within the phantom energy dominated era. We show that in this formalism the phantom energy dominated universe is a transient stage and in the further stage of the universe dynamics, it is dominated, once again, by dark energy. Such an important feature is obtained from the model, rather than imposed to it, and may have a relation to loop quantum cosmology.