Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-08-18
Phys.Lett.B652:43-52,2007
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, 3 figures, improved with some clarification and comments, references added
Scientific paper
10.1016/j.physletb.2007.06.062
We consider the anisotropic evolution of spatial dimensions and the stabilization of internal dimensions in the framework of brane gas cosmology. We observe that the bulk RR field can give an effective potential which prevents the internal subvolume from collapsing. For a combination of $(D-3)$-brane gas wrapping the extra dimensions and 4-form RR flux in the unwrapped dimensions, it is possible that the wrapped subvolume has an oscillating solution around the minimum of the effective potential while the unwrapped subvolume expands monotonically. The flux gives a logarithmic bounce to the effective potential of the internal dimensions.
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