The dynamics of matter bounce cosmology in Weyl-type $f(Q,T)$ gravity

Abstract

In this work, we investigate the dynamics of bouncing cosmologies within the framework of Weyl-type $f(Q,T)$ gravity. Here, $Q$ represents the non-metricity of the space-time, is determined by the vector field $w_{\mu }$, while $T$ represents the trace of the matter energy-momentum tensor. Our objective is to explore the feasibility of avoiding the Big Bang singularity by implementing a matter-bounce cosmology. To achieve this, we consider a specific model with the functional form $f(Q,T)=\alpha Q+\frac{\beta }{6{\kappa }^2}T$, where $\alpha$ and $\beta$ are model parameters. We analyze the dynamical parameters associated with this model and examine the influence of the Weyl-type $f(Q,T)$ theory on these parameters. Moreover, we assess the stability of the proposed model to ensure its viability as a cosmological scenario. Through our analysis, we aim to gain insights into the potential implications and consequences of Weyl-type $f(Q,T)$ gravity for bouncing scenarios, contributing to our understanding of alternative gravitational theories in the context of cosmology.

Chinese Journal of Physics published version

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• Bouncing cosmologies and stability analysis in symmetric teleparallel $f(Q)$ gravity
• Tracing cosmic evolution through Weyl-Type f(Q,T) gravity model: theoretical analysis and observational validation
• Signature flips in time-varying $\Lambda (t)$ cosmological models with observational data
• Modified gravity from Weyl connection and the $f(R,\mathcal{A})$ extension
• Beyond $\Lambda$CDM: Exploring a Dynamical Cosmological Constant Framework Consistent with Late-Time Observations
• Non-singular bouncing cosmology in $f(T,\mathcal{T})$ gravity with energy condition violations
• Logarithmic and Strong Coupling Models in Weyl-Type $f(Q,T)$ Gravity