Cosmic acceleration and energy conditions in $\Lambda$CDM symmetric teleparallel $f(Q)$ gravity

Abstract

In this paper, we study a spatially homogeneous and isotropic FLRW cosmological model in framework of the symmetric teleparallel $f(Q)$ gravity proposed by Jimenez et al. (Physical Review D 98.4 (2018): 044048), where the non-metricity $Q$ is responsible for the gravitational interaction. For the whole analysis we have considered a special form of $f\left(Q\right)$ gravity function i.e. $f\left(Q\right)=\alpha Q^n+\beta$ (where $\alpha$, $\beta$, and $n$ are the dynamical model constant parameters) in the direction of $t\left(z\right)=\frac{k{t}_0}{b}f\left(z\right)$, where, $f\left(z\right)=W\left[\frac{b}{k}{e}^{\frac{b-\ln \left(1+z\right)}{k}}\right]$ and $W$ denotes the Lambert function. We have discussed two cases of the function: linear $f(Q)$ model towards $n=1$ and quadratic for $n=2$. In both the model we had verified the validity of the models with the help of energy conditions along with some physical parameters like equation of state parameter, jerk parameter, statefinder parameters are also discussed in details and compared it with the observational data.

arXiv comment13 pages, 11 figures

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