A Closed Bianchi I Universe in String Theory

Abstract

A special Bianchi I universe is constructed in $4D$ string theory. Geometrically it represents a $3D$ anti-de-Sitter space crossed with a flat direction whereas in terms of an associated conformal field theory it is an extremal case of a gauged WZWN theory with target the coset $SU(1,1)\times R^2/R$. Some of its properties are discussed.

9 pages plain TeX (More typos corrected, a reference added in Ref. [3], and a new equation (Eq. 7) and some clarifications included)

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