标题： 宇宙学中粘性广义 Chaplygin 气体在$f(Q)$引力中的研究 显示英文标题

标题： Cosmology with viscous generalized Chaplygin gas in $f(Q)$ gravity

摘要： 我们使用了体粘度和广义查普林气体（GCG）的混合模型，称为粘性广义查普林气体（VGCG）模型，该模型被认为是宇宙的一种替代暗流体。我们在非度规性$f(Q)$引力框架下，利用函数形式$f(Q)=\beta Q^n$研究了 VGCG 模型的动力学，其中$\beta$和$n$是任意常数。为了限制模型参数，我们使用了最近的观测数据集，如观测哈勃数据、重子声学振荡和类型$Ia$超新星数据。 根据我们的研究，减速参数$q$和状态方程（EoS）参数$w$的演化显示了从减速阶段到加速阶段的转变，并且其与$\Lambda$CDM 模型存在偏差。 显示英文摘要

摘要： We use the hybrid model of bulk viscosity and generalized chaplygin gas (GCG), named the viscous generalized chaplygin gas (VGCG) model, which is thought to be an alternate dark fluid of the universe. We explore the dynamics of the VGCG model in the framework of the non-metricity $f(Q)$ gravity using the functional form $f(Q)=\beta Q^n$, where $\beta$ and $n$ are arbitrary constants. For the purpose of constraining model parameters, we use recent observational datasets such as Observational Hubble data, Baryon Acoustic Oscillations, and Type $Ia$ supernovae data. According to our study, the evolution of the deceleration parameter $q$ and the equation of state (EoS) parameter $w$ show a transition from deceleration to an acceleration phase and its deviation from the $\Lambda$CDM model.