=0 Cosmology of a Brane-like Universe
Abstract
We examine the possibility that Friedman-Robertson-Walker evolution is governed by an effective (rather then by the actual) energy density. A concrete example is provided by =0 Regge-Teitelboim cosmology, where critical cosmology only requires subcritical matter density (m<1), and the age of a flat matter dominated Universe gets enhanced by a factor of 9/8. Dual to the mature dilute Universe is the embryo Universe, the evolution of both is governed by Peff=-1/9eff.
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