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(0,2) Landau-Ginzburg Theory

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arxiv hep-th/9309110 v2 pith:TLXEVIYZ submitted 1993-09-20 hep-th

(0,2) Landau-Ginzburg Theory

classification hep-th
keywords modelslandau-ginzburgcalabi-yaudifferentfindsigmatheoryanalyzed
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A large class of (0,2) Calabi-Yau $\sigma$-models and Landau-Ginzburg orbifolds are shown to arise as different ``phases'' of supersymmetric gauge theories. We find a phenomenon in the Landau-Ginzburg phase which may enable one to understand which Calabi-Yau $\sigma$-models evade destabilization by worldsheet instantons. Examples of (0,2) Landau-Ginzburg vacua are analyzed in detail, and several novel features of (0,2) models are discussed. In particular, we find that (0,2) models can have different quantum symmetries from the (2,2) models built on the same Calabi-Yau manifold, and that a new kind of topology change can occur in (0,2) models of string theory.

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