Λ=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 $\Lambda =0$ Regge-Teitelboim cosmology, where critical cosmology only requires subcritical matter density $({\Omega }_m<1)$, 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 $P_{eff}=-1/9{\rho }_{eff}$.

Revtex, 5 twocolumn pages, No figures (revised version, accepted for publication in Class. Quan. Grav.)

References in corpus (1)

• Quantum Gravity of a Brane-like Universe

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