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Superstrings and Manifolds of Exceptional Holonomy

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arxiv hep-th/9407025 v1 pith:O2GABYID submitted 1994-07-05 hep-th

S.L. Shatashvili , C. Vafa This is my paper · ORCID
classification hep-th
keywords casecompactificationsdownholonomycasescompactificationcorrespondingdimensional
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abstract

The condition of having an $N=1$ spacetime supersymmetry for heterotic string leads to 4 distinct possibilities for compactifications namely compactifications down to 6,4,3 and 2 dimensions. Compactifications to 6 and 4 dimensions have been studied extensively before (corresponding to $K3$ and a Calabi-Yau threefold respectively). Here we complete the study of the other two cases corresponding to compactification down to 3 on a 7 dimensional manifold of $G_2$ holonomy and compactification down to 2 on an 8 dimensional manifold of $Spin(7)$ holonomy. We study the extended chiral algebra and find the space of exactly marginal deformations. It turns out that the role the $U(1)$ current plays in the $N=2$ superconformal theories, is played by tri-critical Ising model in the case of $G_2$ and Ising model in the case of $Spin(7)$ manifolds. Certain generalizations of mirror symmetry are found for these two cases. We also discuss a topological twisting in each case.

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Cited by 5 Pith papers

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