On the Origin of Dark Energy in Brane World Cosmology

Details On the Origin of Dark Energy in Brane World Cosmology On the Origin of Dark Energy in Brane World Cosmology

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..847...15i&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Hori

Astronomy and Astrophysics

Astrophysics

Dark Energy, Origin And Formation Of The Universe, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We investigate the cosmological evolution in a brane-world scenario in which the bulk is not empty. Rather, exchange of mass-energy between the bulk and the bane is allowed. The expansion history of the universe and the evolution of matter fields on the brane are then modified due to this exchange. We show that the flow of matter realizes an accelerating expansion of the brane, which mimics the dark energy. We investigate the constraints from various cosmological observations on the flow of matter from the bulk into the brane. Interestingly, it is possible to have a Λ = 0 cosmology to an observer in the brane which satisfies standard cosmological constraints including the CMB temperature fluctuations, Type Ia supernovae at high redshift, and the matter power spectrum.

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