Viscosity in Modified Gravity 
A bulk viscosity is introduced in the formalism of modified gravity. It is shownthat, based on a natural scaling law for the viscosity, a simple solution can be found forquantities such as the Hubble parameter and the energy density. These solutions mayincorporate a viscosity-induced Big Rip singula...
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MDPI AG
2012-11-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/14/11/2302 |
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doaj-04e656c2612142c5b5fbc671b808c16c2020-11-24T23:05:47ZengMDPI AGEntropy1099-43002012-11-0114112302231010.3390/e14112302Viscosity in Modified Gravity Iver BrevikA bulk viscosity is introduced in the formalism of modified gravity. It is shownthat, based on a natural scaling law for the viscosity, a simple solution can be found forquantities such as the Hubble parameter and the energy density. These solutions mayincorporate a viscosity-induced Big Rip singularity. By introducing a phase transition inthe cosmic fluid, the future singularity can nevertheless in principle be avoided. http://www.mdpi.com/1099-4300/14/11/2302modified gravitycosmologyviscous cosmology&#160 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Iver Brevik |
| spellingShingle |
Iver Brevik Viscosity in Modified Gravity  Entropy modified gravity cosmology viscous cosmology&#160 |
| author_facet |
Iver Brevik |
| author_sort |
Iver Brevik |
| title |
Viscosity in Modified Gravity  |
| title_short |
Viscosity in Modified Gravity  |
| title_full |
Viscosity in Modified Gravity  |
| title_fullStr |
Viscosity in Modified Gravity  |
| title_full_unstemmed |
Viscosity in Modified Gravity  |
| title_sort |
viscosity in modified gravity  |
| publisher |
MDPI AG |
| series |
Entropy |
| issn |
1099-4300 |
| publishDate |
2012-11-01 |
| description |
A bulk viscosity is introduced in the formalism of modified gravity. It is shownthat, based on a natural scaling law for the viscosity, a simple solution can be found forquantities such as the Hubble parameter and the energy density. These solutions mayincorporate a viscosity-induced Big Rip singularity. By introducing a phase transition inthe cosmic fluid, the future singularity can nevertheless in principle be avoided.  |
| topic |
modified gravity cosmology viscous cosmology&#160 |
| url |
http://www.mdpi.com/1099-4300/14/11/2302 |
| work_keys_str_mv |
AT iverbrevik viscosityinmodifiedgravityamp160 |
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