# Phantom-Like Behavior in Modified Teleparallel Gravity

## TL;DR

This paper demonstrates that modified teleparallel gravity can produce effective phantom-like cosmic behavior consistent with observations without requiring a phantom field, by exploring specific f(T) models.

## Contribution

It introduces a method to realize phantom-like cosmic acceleration within modified teleparallel gravity without using phantom fields.

## Key findings

- Certain f(T) models can produce phantom-like behavior.
- Effective phantom behavior is achievable without instabilities.
- Model parameter spaces include regions with phantom-like solutions.

## Abstract

The recent data from Planck2018 shows that the equation of state parameter of effective cosmic fluid today is w0 =-1.03. This indicates that it is possible for the universe to be in a phantom dominated era today. While a phantom field is essentially capable to explain this observation, it suffers from some serious problems such as instabilities and violation of the null energy condition. So, it would be interesting to realize this effective phantom behavior without adopting a phantom field. In this paper we study possible realization of an effective phantom behavior in modified teleparallel gravity. We show that modified teleparallel gravity is able essentially to realize an effective phantom-like behavior in the absence of a phantom field. For this purpose, we choose some observationally viable f(T) functions and prove that there are some subspaces of the models parameter space capable of realizing a phantom-like behavior without adopting a phantom field.