Viscous dark energy and phantom evolution

Mauricio Cataldo, Norman Cruz, Samuel Lepe

Research output: Contribution to journalArticlepeer-review

125 Scopus citations


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.

Original languageEnglish
Pages (from-to)5-10
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 14 Jul 2005


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