Relaxing to Three Dimensions

Details Relaxing to Three Dimensions Relaxing to Three Dimensions

2005-06-06

arxiv.org/abs/hep-th/0506053v2

Phys.Rev.Lett.95:161601,2005

Physics

High Energy Physics

High Energy Physics - Theory

4 pages; minor improvements, references added

Scientific paper

10.1103/PhysRevLett.95.161601

We propose a new selection principle for distinguishing among possible vacua that we call the "relaxation principle". The idea is that the universe will naturally select among possible vacua through its cosmological evolution, and the configuration with the biggest filling fraction is the likeliest. We apply this idea to the question of the number of dimensions of space. We show that under conventional (but higher-dimensional) FRW evolution, a universe filled with equal numbers of branes and antibranes will naturally come to be dominated by 3-branes and 7-branes. We show why this might help explain the number of dimensions that are experienced in our visible universe.

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