A transitioning universe with anisotropic dark energy

TL;DR

This paper proposes a cosmological model of a transitioning universe with anisotropic dark energy and minimal interaction, explaining both early and late-time acceleration without singularities.

Contribution

It introduces a new Bianchi I universe model with a hybrid scale factor and time-varying deceleration parameter, capturing universe's transition from deceleration to acceleration.

Findings

Model explains accelerating universe and singularity-free evolution

Time-varying deceleration parameter describes universe's transition phases

Physical and geometrical properties of the model are analyzed

Abstract

In this paper, we present a model of transitioning universe with minimal interaction between perfect fluid and anisotropic dark energy in Bianchi I space-time. The two sources are assumed to minimally interacted and therefore their energy momentum tensors are conserved separately. The explicit expression for average scale factor are considered in hybrid form that gives time varying deceleration parameter which describes both the early and late time physical features of universe. We also discuss the physical and geometrical properties of the model derived in this paper. The solution is interesting physically as it explain accelerating universe as well as singularity free universe.