A Closed, Expanding Universe in String Theory
Abstract
We present a conformal field theory -- obtained from a gauged WZW model -- that describes a closed, inhomogeneous expanding and recollapsing universe in 3+1 dimensions. A possible violation of cosmic censorship is avoided because the universe recollapses just when a naked singularity was about to form. The model has been chosen to have c=4 (or c=4 in the supersymmetric case), just like four dimensional Minkowski space.
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