Observational Constraints on Hybrid Scale Factor in f(Q,T) Gravity with Anisotropic Space-Time

TL;DR

This paper investigates an accelerating universe model within extended symmetric teleparallel gravity using a hybrid scale factor, constraining parameters with cosmological data and analyzing late-time cosmic behavior.

Contribution

It introduces a hybrid scale factor in f(Q,T) gravity to model cosmic acceleration and constrains it with observational data, highlighting its significance for late-time cosmology.

Findings

Present deceleration parameter aligns with observations.

Equation of state approaches $\, m \, ext{Lambda} CDM$ at late times.

Strong energy condition is violated in the model.

Abstract

In this paper, we present an accelerating cosmological model by constraining the free parameters using the cosmological datasets in an extended symmetric teleparallel gravity for the flat and anisotropic space-time. We employ a time variable deceleration parameter that behaves early deceleration and late time acceleration in the form of Hybrid Scale Factor (HSF). We obtain the present values of deceleration parameter and analyse the late time behavior of the Universe based on the best-fit values of free parameters. We derive the dynamical parameters of the model and obtain the equation of state parameter at present in the quintessence region; however at late time it approaches to $\Lambda$CDM. The energy conditions are also analysed to validate the modified gravity and we find that strong energy condition is violating. We establish the importance of hybrid scale factor in the late time cosmic phenomena issue.