Numerical Solutions of Inflating Higher Dimensional Global Defects

Details Numerical Solutions of Inflating Higher Dimensional Global Defects Numerical Solutions of Inflating Higher Dimensional Global Defects

2005-03-15

arxiv.org/abs/gr-qc/0503064v2

Phys.Rev. D71 (2005) 084002

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 7 figures, ReVTeX4, Accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.71.084002

We find numerical solutions of Einstein equations and scalar field equation for a global defect in higher dimensional spacetimes ($\geq 6$). We examine in detail the relation among the expansion rate $H$ and the symmetry-breaking scale $\eta$ and the number of extra dimensions $n$ for these solutions. We find that even if the extra dimensions do not have a cigar geometry, the expansion rate $H$ grows as $\eta$ increases, which is opposite to what is needed for the recently proposed mechanism for solving the cosmological constant problem. We also find that the expansion rate $H$ decreases as $n$ increases.

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