arXiv subjects

Barkha Taori

Publications and source records attributed to Barkha Taori.

2 recordsLinked to original sources

arXiv2020

Mixed fluid cosmological model in $f(R,T)$ gravity

We construct Locally Rotationally Symmetric (LRS) Bianchi type-I cosmological model in $f(R,T)$ theory of gravity when the source of gravitation is the mixture of barotropic fluid and dark energy (DE) by employing a time varying deceleration parameter (DP). We observe through the behavior of the state finder parameters $(r, s)$ that our model begins from the Einstein static era and goes to $Λ$CDM era. The EoS parameter($ω_d$) for DE varies from phantom ($ω<-1$) phase to quintessence ($ω>-1$) phase which is consistent with the observational results. It is found that the discussed model can reproduce the current accelerating phase of expansion of the universe.

physics.gen-ph↗

arXiv2019

Phantom energy dominated universe as a transient stage in $f(R)$ cosmology

The $f(R)$ theories of gravity are the most popular, simple and well succeeded extension of Einstein's General Relativity. They can account for some observational issues of standard cosmology with no need for evoking the dark sector of the universe. In the present letter we will investigate LRS Bianchi type-I space-time in $f(R)$ gravity theory within the phantom energy dominated era. We show that in this formalism the phantom energy dominated universe is a transient stage and in the further stage of the universe dynamics, it is dominated, once again, by dark energy. Such an important feature is obtained from the model, rather than imposed to it, and may have a relation to loop quantum cosmology.

gr-qc↗