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The European Physical Journal C

, Volume 56, Issue 4, pp 579–583 | Cite as

Viscous modified gravity on a RS brane embedded in AdS5

  • Iver BrevikEmail author
Regular Article - Theoretical Physics

Abstract

We consider a modified gravity fluid on a Randall–Sundrum II brane situated at y=0, the action containing a power α of the scalar curvature. As is known from 4D spatially flat modified gravity, the presence of bulk viscosity may drive the cosmic fluid into the phantom region (w<−1) and thereafter inevitably into the Big Rip singularity, even if it is initially nonviscous and lies in the quintessence region (w>−1). The condition for this to occur is that the bulk viscosity contains the power (2α−1) of the scalar expansion. We combine this with the 5D RS II model, and we find that the Big Rip, occurring for α>1/2, carries over to the metric for the bulk metric, |y|>0. Actually, the scale factors on the brane and in the bulk become simply proportional to each other.

Keywords

Dark Energy Scalar Curvature Hubble Parameter Bulk Viscosity Einstein Gravity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  1. 1.Department of Energy and Process EngineeringNorwegian University of Science and TechnologyTrondheimNorway

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