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D-Brane Charges in Gepner Models

Volker Braun, Sakura Schafer-Nameki

hep-tharXiv:hep-th/0511100

Abstract

We construct Gepner models in terms of coset conformal field theories and compute their twisted equivariant K-theories. These classify the D-brane charges on the associated geometric backgrounds and therefore agree with the topological K-theories. We show this agreement for various cases, in particular the Fermat quintic.

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