Interaction of Anisotropic Dark Energy with Generalized Hybrid Expansion Law

TL;DR

This paper explores anisotropic dark energy interactions within a modified gravity framework, deriving exact solutions that show a transition from deceleration to acceleration, aligning with current cosmological observations.

Contribution

It introduces a new exact solution for anisotropic dark energy in f(R,T) gravity using a generalized hybrid expansion law, highlighting late-time acceleration.

Findings

Universe transitions from deceleration to acceleration

Model aligns with ΛCDM at late times

Estimated universe age is approximately 13.82 Gyr

Abstract

Interaction of dark energy in the anisotropic Locally Rotationally Symmetric (LRS) Bianchi type-I metric is investigated in the context of modified f(R,T) theory of gravity, where R is the Ricci scalar and T is the trace of stress energy momentum tensor. We choose the particular form of the functional f(R,T)=f_1 (R,T)+f_2 (R,T) then we find the exact solutions of the field equations by applying inhomogeneous equation of state, p= {\omega}\r{ho}-{\Lambda}(t) and a generalized form of hybrid expansion law. Transition of deceleration to acceleration is observed in this model. It is also observed that the Universe shows accelerated expansion at late epoch. The derived model overlaps with {\Lambda}CDM at late time which is in agreement with present observation. Energy conditions of the derived model are also investigated. From the plot, we observe the age of Universe t_0=13.821 Gyr for the observed H_0=70.07Kms^(-1) Mpc^(-1). The physical and geometrical behaviours of these models are also discussed.