1/R multidimensional gravity with form fields : stabilization of extra dimensions and cosmic acceleration

T.A. Saidov, A. Zhuk

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Samenvatting

We study multidimensional gravitational models with scalar curvature nonlinearity of the type 1/R and with form-fields (fluxes) as a matter source. It is assumed that the higher dimensional space-time undergoes Freund-Rubin-like spontaneous compactification to a warped product manifold. It is shown that for certain parameter regions the model allows for a freezing stabilization of the internal space near the positive minimum of the effective potential which plays the role of the positive cosmological constant. This cosmological constant provides the observable late-time accelerating expansion of the Universe if the parameters of the model are fine tuned. Additionally, the effective potential has the saddle point. It results in domain walls in the Universe. We show that these domain walls do not undergo inflation.
Originele taal-2Engels
Pagina's (van-tot)084037-1/11
Aantal pagina's11
TijdschriftPhysical Review D: Particles and Fields, Gravitation, and Cosmology
Volume75
Nummer van het tijdschrift8
StatusGepubliceerd - 2007

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