Casimir Effect in a Supersymmetry-Breaking Brane-World as Dark Energy

Details Casimir Effect in a Supersymmetry-Breaking Brane-World as Dark Energy Casimir Effect in a Supersymmetry-Breaking Brane-World as Dark Energy

2004-09-10

arxiv.org/abs/astro-ph/0409238v2

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures

Scientific paper

A new model for the origin of dark energy is proposed based on the Casimir effect in a supersymmetry-breaking brane-world. Supersymmetry is assumed to be preserved in the bulk while broken on a 3-brane. Due to the boundary conditions imposed on the compactified extra dimensions, there is an effective Casimir energy induced on the brane. The net Casimir energy contributed from the graviton and the gravitino modes as a result of supersymmetry-breaking on the brane is identified as the observed dark energy, which in our construction is a cosmological constant. We show that the smallness of the cosmological constant, which results from the huge contrast in the extra-dimensional volumes between that associated with the 3-brane and that of the bulk, is attainable under very relaxed conditions.

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