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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| Format: | Article |
| Language: | English |
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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 |
| Summary: | 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.  |
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| ISSN: | 1099-4300 |