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# Albion Lawrence : D-Branes on Calabi-Yau Threefolds

D-branes on Calabi-Yau threefolds are interesting both as alternative probes of quantum geometry, and as nontrivial realizations of gauge theories with four supercharges. Of course, these issues are not independent. In this talk I will briefly discuss the former by describing and characterizing D-brane states at the Gepner point in the moduli space of the quintic. I will then use such D-branes to realize d=4 N=1 SUSY gauge theories, and discuss the computation of the superpotential of these theories, particularly for those realized by D6-branes wrapped around special Lagrangian submanifolds of the threefold. I will close with some speculations on the implications of mirror symmetry for these superpotentials.

**Category**: String Theory**Duration**: 01:00:55**Date**: October 14, 1999 at 4:00 PM**Views**: 26-
**Tags:**seminar, String Theory Seminar

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