Study of Cosmic Evolution admitting Thermodynamic Analysis

TL;DR

This paper explores cosmic evolution within symmetric teleparallel theory, reconstructing models that exhibit bouncing behavior, violate null energy condition, and align with current acceleration, while also examining thermodynamic laws.

Contribution

It introduces a reconstructed symmetric teleparallel model demonstrating bouncing cosmology and thermodynamic consistency, addressing singularity issues in cosmic evolution.

Findings

Cosmic bounce scenarios are achieved with null energy condition violation.

The model predicts acceleration near the bouncing point.

Second law of thermodynamics holds in the reconstructed framework.

Abstract

This article examines the cosmic evolution in the framework of symmetric teleparallel theory, characterized by the function of non-metricity scalar $(\mathcal{Q})$. We use the e-folding number and reconstruction method with a suitable parametrization of the scale factor to obtain the functional form of symmetric teleparallel theory. Using this reconstructed model, we examine the behavior of different cosmographic parameters to demonstrate the bouncing scenarios of the cosmos by considering the contraction and expansion phases of cosmos before and after the bouncing point, respectively. It is found that the null energy condition is violated which shows that the singularity issue can be resolved in this extended theoretical framework. Moreover, we observe that the acceleration occurs near the bouncing point and the reconstructed model aligns with the current cosmic expansion. Finally, we check the validity of second law of thermodynamics in the bouncing framework of our model.