D-Brane Charges in Gepner Models

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.

25 pages, 2 figures. LaTeX. v2: typos and references corrected. v3: reference added

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