Journal
PHYSICAL REVIEW D
Volume 84, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.103508
Keywords
-
Funding
- ESF CASIMIR Network
- MICINN (Spain) [FIS2006-02842, FIS2010-15640]
- CPAN
- AGAUR [2009SGR-994]
- Global COE of Nagoya University
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- JSPS [22224003, 23540296]
- Grants-in-Aid for Scientific Research [22224003, 23540296] Funding Source: KAKEN
Ask authors/readers for more resources
Dark energy of phantom or quintessence nature with an equation of state parameter w almost equal to -1 often leads the universe evolution to a finite-time future singularity. An elegant solution to this problem has been recently proposed [P. H. Frampton, K. J. Ludwick, and R. J. Scherrer, Phys. Rev. D 84, 063003 (2011).] under the form of the so-called little rip cosmology, which appears to be a realistic alternative to the Lambda CDM model. A viscous little rip cosmology is here proposed. Whereas generically bulk viscosity tends to promote the big rip, we find that there are a number of situations where this is not the case and where the formalism nicely adjusts itself to the little rip scenario. We prove, in particular, that a viscous fluid (or, equivalently, one with an inhomogeneous [imperfect] equation of state) is perfectly able to produce a little rip cosmology as a purely viscosity effect. The possibility of its induction as a combined result of viscosity and a general (powerlike) equation of state is also investigated in detail. To finish, a physical, inertial force interpretation of the dissolution of bound structures in the little rip cosmology is presented.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available