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arxiv: hep-th/9206078 · v1 · submitted 1992-06-19 · ✦ hep-th

A Closed, Expanding Universe in String Theory

Chiara R. Nappi , Edward Witten This is my paper
classification ✦ hep-th
keywords universeclosedexpandingjustmodeltheoryavoidedbecause
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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 $\widehat c=4$ in the supersymmetric case), just like four dimensional Minkowski space.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. On Cosmological Singularities in String Theory

    hep-th 2026-01 unverdicted novelty 5.0

    Perturbations in string theory on a three-sphere spacetime cause big-bang/crunch singularities or unbounded expansion, which string theory may resolve.