D-branes and Discrete Torsion
Michael R. Douglas
Abstract
We show that discrete torsion is implemented in a D-brane world-volume theory by using a projective representation of the orbifold point group. We study the example of C3/Z2 x Z2 and show that the resolution of singularities agrees with that proposed by Vafa and Witten. A new type of fractional brane appears.
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