Nonlinear bulk viscosity and the stability of accelerated expansion in FRW spacetime

Abstract

In the context of dark energy solutions, we consider a Friedmann-Robertson-Walker spacetime filled with a non-interacting mixture of dust and a viscous fluid, whose bulk viscosity is governed by the nonlinear model proposed in [15]. Through a phase space analysis of the equivalent dynamical system, existence and stability of critical solutions are established and the respective scale factors are computed. The results point towards the possibility of describing the current accelerated expansion of the Universe by means of the abovementioned nonlinear model for viscosity.

arXiv comment12 pages, 7 figures

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Cited by in corpus (15)

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• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Testing the equation of state for viscous dark energy
• Crossing the phantom divide with dissipative normal matter in the Israel-Stewart-Hiscock formalism
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• Phase space analysis of a FRW cosmology in the Maxwell$-$Cattaneo approach