Dark Energy Density in Brane World

Details Dark Energy Density in Brane World Dark Energy Density in Brane World

2005-02-08

arxiv.org/abs/hep-th/0502078v1

Chin.Phys.Lett. 22 (2005) 816-819

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, no figures, to appear in Chin.Phys.Lett

Scientific paper

10.1088/0256-307X/22/4/010

We present a possible explanation to the tiny positive cosmological constant under the frame of AdS$_5$ spacetime embedded by a dS$_4$ brane. We calculate the dark energy density by summing the zero point energy of massive scalar fields in AdS$_5$ spacetime. Under the assumption that the radius of AdS$_5$ spacetime is of the same magnitude as the radius of observable universe, the dark energy density in dS$_4$ brane is obtained, which is smaller than the observational value. The reasons are also discussed.

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