Dark energy nature of viscus universe in -gravity with observational constraints

A Pradhan, DC Maurya, A Dixit - International Journal of Geometric …, 2021 - World Scientific
In this study, we have investigated the dark energy behavior of the viscus-fluid in f (Q)-gravity
in a flat, isotropic and homogeneous Friedmann–Lemaitre–Robertson–Walker (FLRW) …

Challenging bulk viscous unified scenarios with cosmological observations

W Yang, S Pan, E Di Valentino, A Paliathanasis, J Lu - Physical Review D, 2019 - APS
In a spatially flat Friedmann-Lemaître-Robertson-Walker universe, we investigate a unified
cosmic fluid scenario endowed with bulk viscosity in which the coefficient of the bulk …

Bulk viscous matter and recent acceleration of the universe based on causal viscous theory

NDJ Mohan, A Sasidharan, TK Mathew - The European Physical Journal …, 2017 - Springer
The evolution of the bulk viscous matter dominated universe has been analysed using the
full causal theory for the evolution of the viscous pressure in the context of the recent …

Bulk viscous matter and recent acceleration of the universe

A Sasidharan, TK Mathew - The European Physical Journal C, 2015 - Springer
We consider a cosmological model dominated by bulk viscous matter with a total bulk
viscosity coefficient proportional to the velocity and acceleration of the expansion of the …

No compelling cosmological models come out of magnetic universes which are based on nonlinear electrodynamics

R Garcia-Salcedo, T Gonzalez, I Quiros - Physical Review D, 2014 - APS
Here we investigate the cosmic dynamics of Friedmann-Robertson-Walker universes—flat
spatial sections—which are driven by nonlinear electrodynamics (NLED) Lagrangians. We …

Introduction to the application of dynamical systems theory in the study of the dynamics of cosmological models of dark energy

R García-Salcedo, T Gonzalez… - European Journal of …, 2015 - iopscience.iop.org
The theory of dynamical systems is a very complex subject that has produced several
surprises in the recent past in connection with the theory of chaos and fractals. The …

Global asymptotic dynamics of cosmological Einsteinian cubic gravity

I Quiros, R García-Salcedo, T Gonzalez, JLM Martínez… - Physical Review D, 2020 - APS
We investigate the cosmological dynamics of an up to cubic curvature correction to general
relativity (GR) known as cosmological Einsteinian cubic gravity, whose vacuum spectrum …

Phase space analysis of bulk viscous matter dominated universe

A Sasidharan, TK Mathew - Journal of High Energy Physics, 2016 - Springer
A bstract We consider a Friedmann model of the universe with bulk viscous matter and
radiation as the cosmic components. We study the asymptotic properties in the equivalent …

Viscous fluid dynamics with decaying vacuum energy density

CP Singh, V Khatri - Physical Review D, 2024 - APS
In this work, we investigate the dynamics of bulk viscous models with decaying vacuum
energy density (VED) in a spatially homogeneous and isotropic flat Friedmann-Lemaître …

Viscous cosmology in holographic dark energy with Granda–Oliveros cut-off

S Kaur, CP Singh - Communications in Theoretical Physics, 2023 - iopscience.iop.org
We study the effect of bulk viscosity on holographic dark energy (HDE) with Granda–
Oliveros infra-red cut-off. We focus on a generalized form of the bulk viscous coefficient …