Viscous dark energy and phantom evolution

Details Viscous dark energy and phantom evolution Viscous dark energy and phantom evolution

2005-06-17

arxiv.org/abs/hep-th/0506153v1

Phys.Lett.B619:5-10,2005

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1016/j.physletb.2005.05.029

In order to study if the bulk viscosity may induce a big rip singularity on the flat FRW cosmologies, we investigate dissipative processes in the universe within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, and in the full causal Israel–Stewart-Hiscock theory. We have found cosmological solutions which exhibit, under certain constraints, a big rip singularity. We show that the negative pressure generated by the bulk viscosity cannot avoid that the dark energy of the universe to be phantom energy.

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