Singularity free cosmological models in viscous symmetric teleparallel gravity

Abstract

In this paper, we have investigated the possibility of deriving exact non-singular cosmological solutions in a combined scenario of bulk viscous fluid and symmetric teleparallel gravity (f(Q) gravity). Interestingly, we have found that the general solutions obtained from our models are flexible enough for demonstrating the emergent Universe scenario, inflation and late-time dark-energy-like behaviour. We have found that these phases of the Universe depend crucially on the viscosity parameters ζ0, ζ1 considered in this work and also the parameter n associated with the f(Q) model. Hence, we performed an analysis concerning the model’s relevance with the observed data to constrain the aforementioned parameters.