Rip cosmological models in extended symmetric teleparallel gravity

TL;DR

This paper explores different rip cosmological models within an extended symmetric teleparallel gravity framework, analyzing their dynamics, energy conditions, and cosmographic parameters to understand their implications for universe evolution.

Contribution

It introduces a new class of rip models in extended symmetric teleparallel gravity with specific functional forms and analyzes their physical viability.

Findings

Identified conditions for Little Rip, Big Rip, and Pseudo Rip scenarios.

Derived energy conditions and cosmographic parameters for each rip model.

Provided insights into the universe's potential future evolution under these models.

Abstract

In this paper we have investigated some rip cosmological models in an extended symmetric teleparallel gravity theory. We consider the form $f(Q,T)=aQ^m+bT$ in the Einstein-Hilbert action and expressed the field equations and the dynamical parameters in terms of the non-metricity $Q$. Three rip models such as Little Rip, Big Rip and Pseudo Rip are presented. The energy conditions and the cosmographic parameters are derived and analysed for all these models.