Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
Volume 19, Issue 2, Pages 171-181Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218271810016361
Keywords
RSII braneworld; viscous dark energy; apparent horizon; generalized second law of thermodynamics
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Funding
- Research Institute for Astronomy and Astrophysics of Maragha, Iran
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We show that for an RSII braneworld filled with interacting viscous dark energy and dark matter, one can always rewrite the Friedmann equation in the form of the first law of thermodynamics, dE = T(h)dS(h) + WdV, at the apparent horizon. In addition, the generalized second law of thermodynamics can be fulfilled in a region enclosed by the apparent horizon on the brane for both constant and time-variable five-dimensional Newton's constant G(5). These results hold regardless of the specific form of the dark energy. Our study further supports the belief that in an accelerating universe with spatial curvature, the apparent horizon is a physical boundary from the thermodynamical point of view.
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