2003•Physics Letters BOpen access

Wrapped branes and compact extra dimensions in cosmology

Ali Kaya, T. Rador

Abstract

We present a cosmological model in 1+m+p dimensions, where in m-dimensional space there are uniformly distributed p-branes wrapping over the extra p dimensions. We find that during cosmological evolution m-dimensional space expands with the exact power-law corresponding to pressureless matter while the extra p dimensions contract. Adding matter, we also obtain solutions having the same property. We show that this might explain in a natural way why the extra dimensions are small compared to the observed three spatial directions.

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Key concepts: Brane cosmology, Extra dimensions, Cosmology, Physics, Space (punctuation), Theoretical physics, Cosmological model, Property (philosophy)