Exact braneworld cosmology induced from bulk black holes

Details Exact braneworld cosmology induced from bulk black holes Exact braneworld cosmology induced from bulk black holes

2002-04-25

arxiv.org/abs/hep-th/0204218v3

Class.Quant.Grav. 19 (2002) 4071-4083

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, no figures; v3: Minor change, References added, Version to appear in CQG

Scientific paper

10.1088/0264-9381/19/15/313

We use a new, exact approach in calculating the energy density measured by an observer living on a brane embedded in a charged black hole spacetime. We find that the bulk Weyl tensor gives rise to non-linear terms in the energy density and pressure in the FRW equations for the brane. Remarkably, these take exactly the same form as the ``unconventional'' terms found in the cosmology of branes embedded in pure AdS, with extra matter living on the brane. Black hole driven cosmologies have the benefit that there is no ambiguity in splitting the braneword energy momentum into tension and additional matter. We propose a new, enlarged relationship between the two descriptions of braneworld cosmology. We also study the exact thermodynamics of the field theory and present a generalised Cardy-Verlinde formula in this set up.

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