Cosmic acceleration with bulk viscosity in modified f (Q) gravity

R Solanki, SKJ Pacif, A Parida, PK Sahoo - Physics of the Dark Universe, 2021 - Elsevier
In this article, we have investigated the role of bulk viscosity to study the accelerated
expansion of the universe in the framework of modified f (Q) gravity. The gravitational action …

Observational constraints on the equation of state of viscous fluid in f (R, T) gravity

M Koussour, A Altaibayeva, S Bekov, O Donmez… - Physics of the Dark …, 2024 - Elsevier
In this paper, we investigate a cosmological model based on viscous f (R, T) gravity as a
potential alternative to dark energy. This model incorporates bulk viscosity and is analyzed …

Constraining the Viscous Dark Energy Equation of State in f (R, Lm) Gravity

LV Jaybhaye, R Solanki, S Mandal, PK Sahoo - Universe, 2023 - mdpi.com
In this article, we attempt to describe the cosmic late-time acceleration of the universe in the
framework of f (R, L m) gravity, by using an effective equation of state, when bulk viscosity is …

Tsallis holographic dark energy scenario in viscous gravity with tachyon field

S Gupta, A Dixit, A Pradhan - International Journal of Geometric …, 2023 - World Scientific
This study investigates a bulk viscous fluid anisotropic cosmological model with f (Q) gravity.
Here, Q stands for the nonmetricity factor that drives gravitational interaction. We …

Phase-space analysis of the viscous fluid cosmological models in the coincident f (Q) gravity

DS Rana, R Solanki, PK Sahoo - Physics of the Dark Universe, 2024 - Elsevier
In this article, we consider a newly proposed parameterization of the viscosity coefficient ζ,
specifically ζ= ζ ̄ 0 Ω ms H, where ζ ̄ 0= ζ 0 Ω m 0 s within the coincident f (Q) gravity …

Bulk viscous cosmological model in f (T, T) modified gravity

R Solanki, A Bhat, PK Sahoo - Astroparticle Physics, 2024 - Elsevier
This article explores the impact of bulk viscosity on understanding the universe's accelerated
expansion within the context of modified f (T, T) gravity, which is an extension of the f (T) …

Constraining f (Q, Lm) gravity with bulk viscosity

Y Myrzakulov, O Donmez, M Koussour… - Physics of the Dark …, 2025 - Elsevier
We investigate the influence of bulk viscosity on late-time cosmic acceleration within an
extended f (Q, L m) gravity framework, where the non-metricity Q is non-minimally coupled …

Observational Constraints and Some Toy Models in f(Q) Gravity with Bulk Viscous Fluid

S Mandal, A Parida, PK Sahoo - Universe, 2022 - mdpi.com
The standard formulation of general relativity fails to describe some recent interests in the
universe. It impels us to go beyond the standard formulation of gravity. The f (Q) gravity …

[HTML][HTML] Viscous cosmology in f (T) gravity

J Yang, RH Lin, XH Zhai - The European Physical Journal C, 2022 - Springer
We propose a new model for the viscosity of cosmic matters, which can be applied to
different epochs of the universe. Using this model, we include the bulk viscosities as …

Viscous fluid cosmology in symmetric teleparallel gravity

R Solanki, DS Rana, S Mandal… - Fortschritte der …, 2023 - Wiley Online Library
In this article, the viscous fluid cosmological model is analyzed in the framework of recently
proposed f (Q) f(Q) gravity by assuming three different forms of bulk viscosity coefficients …