FRW Universe in R2 Gravity

Open Access

Year : 2023 | Volume : 11 | Special Issue : 07 | Page : 75-80
By

    Lokesh Kumar Sharma

  1. Assistant Professor, Department of Physics, GLA University, Uttar Pradesh, India

Abstract

We investigate a model of the Friedmann Robertson Walker metric (FRW) universe governed by hybrid expansion law (HEL) a = tα eβt in R2 gravity. By Applying, energy and stability conditions in derived model, we check its physical viability. This model is based on f (R, T) = f (R) + f (T); f (R) = R + αR2 and f (T) = T and we have assumed T = 3p > 0. It is important to note that our model gives the current universe observable properties, including acceleration, without introducing dark energy or the cosmological constant. The following are some key features of the resulting model: Throughout the expansion of the cosmos, the jerk parameter has a positive sign, but the deceleration parameter has a negative sign. The current universe’s late-time acceleration is confirmed by this. Finally, we may say that f (R, T) gravity can give a considerable amount of information. There is no need for dark energy or the cosmological constant in a cosmic scenario with late time acceleration. As a consequence, one may argue that f (R) = R + αR2 is a dark energy model alternative that must be considered when defining the universe. We also discuss the jerk, lerk and snap parameters.

Keywords: R2 gravity, accelerating universe,

[This article belongs to Special Issue under section in Journal of Polymer and Composites(jopc)]

How to cite this article: Lokesh Kumar Sharma FRW Universe in R2 Gravity jopc 2023; 11:75-80
How to cite this URL: Lokesh Kumar Sharma FRW Universe in R2 Gravity jopc 2023 {cited 2023 Nov 30};11:75-80. Available from: https://journals.stmjournals.com/jopc/article=2023/view=129359

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Special Issue Open Access Review Article
Volume 11
Special Issue 07
Received July 12, 2023
Accepted October 19, 2023
Published November 30, 2023