Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-08-26
Prog.Theor.Phys. 110 (2003) 457-498
Physics
High Energy Physics
High Energy Physics - Theory
43 pages, 12 figures, PTPTeX. Accepted for publication in Progress of Theoretical Physics
Scientific paper
10.1143/PTP.110.457
We investigate dilaton stabilization in a higher-dimensional theory. The background geometry is based on an eleven-dimensional Kaluza-Klein/supergravity model, which is assumed to be a product of four-dimensional de Sitter (dS_4) spacetime and a seven sphere. The dilaton potential has a local minimum resulting from contributions of the cosmological constant, the curvature of the internal spacetime and quantum effects of the background scalar, vector, spinor, and tensor fields. The dilaton settles down to the local minimum, and the scale of the extra dimensions eventually become time independent. Our four-dimensional universe evolves from dS_4 into AdS_4 after stabilization of the extra dimension.
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