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APS » Phys. Rev. D » Volume 75 » Issue 8

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Phys. Rev. D 75, 087303 (2007) [4 pages]

Dark energy from bulk matter

Abstract

References (18)

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C. Bogdanos, A. Dimitriadis, and K. Tamvakis
Physics Department, University of Ioannina, Ioannina GR451 10, Greece

Received 19 December 2006; published 19 April 2007

Weconsider the possibility of getting accelerated expansion and w=-1 crossingin the context of a braneworld cosmological setup, endowed witha bulk energy-momentum tensor. For a given ansatz of thebulk content, we demonstrate that the bulk pressures dominate thedynamics at late times and can lead to accelerated expansion.We also analyze the constraints under which we can geta realistic profile for the effective equation of state andconclude that matter in the bulk has the effect ofdark energy on the brane. Furthermore, we show that itis possible to simulate the behavior to a Chaplygin gasusing nonexotic bulk matter.

©2007 The American Physical Society

URL:	http://link.aps.org/doi/10.1103/PhysRevD.75.087303
DOI:	10.1103/PhysRevD.75.087303
PACS:	98.80.-k; 04.50.+h; 95.36.+x 98.80.-k Cosmology 04.50.+h Gravity in more than four dimensions, Kaluza–Klein theory, unified field theories; alternative theories of gravity 95.36.+x Dark energy YEAR: 2007

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