Bounce solutions in viscous fluid cosmology

Abstract

We investigate the bounce cosmology induced by inhomogeneous viscous fluids in FRW space-time (non necessarly flat), taking into account the early-time acceleration after the bounce. Different forms for the scale factor and several examples of fluids will be considered. We also analyze the relation between bounce and finite-time singularities and between the corresponding fluids realizing this scenarios. In the last part of the work, the study is extended to the framework of $f(R)$-modified gravity, where the modification of gravity may also be considered as an effective (viscous) fluid producing the bounce.

12 pages, final version, references added, accepted in Astrophys.Space Sci

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• Dark Energy Coupled with Dark Matter in Viscous Fluid Cosmology
• Non-polynomial Lagrangian approach to Regular Black Holes
• A special class of solutions in $F(R)$-gravity
• A note on a mimetic scalar-tensor cosmological model
• Phantom cosmology in an Extended Theory of Gravity
• Bouncing Models in an Extended Gravity Theory
• Deformed Matter Bounce with Dark Energy Epoch
• Pre-inflationary primordial perturbations
• Reconstruction and Stability Analysis of Some Cosmological Bouncing Solutions in $F(\mathcal{R},T)$ Theory
• Bouncing cosmological models in $f(R,L_m)$ gravity
• Viscous Coupled Fluids in Inflationary Cosmology
• Rip cosmologies, Wormhole Solutions and Big Trip in the $f(T,\mathcal{T})$ theory of gravity
• Loop Quantum Cosmology Matter Bounce Reconstruction from $F(R)$ Gravity Using an Auxiliary Field
• Inhomogeneous viscous fluids for inflation
• Linking little rip cosmologies with regular early universes
• Inflation and Bounce from Classical and Loop Quantum Cosmology Imperfect Fluids
• Cosmological Models Coupled with Dark Matter in a Dissipative Universe
• Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology
• Creation of wormholes during the cosmological bounce
• A class of simple bouncing and late-time accelerating cosmologies in f(R) gravity
• Holographic cosmology with two coupled fluids in the presence of viscosity
• Non-Singular Bouncing cosmology from Phantom Scalar-Gauss-Bonnet Coupling: Reconstruction with Observational Insights
• The Holographic cosmology with axion field
• Bouncing solutions from generalized EoS
• Scalar field unification of interacting viscous dark fluid from a geometrical scalar-tensor theory of gravity
• Ricci cosmology in light of astronomical data
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions