Daniel Bundzik, Anna Tollstén
The Geometry of Fractional D1-branes
hep-th/0403099
Class.Quant.Grav. 21 (2004) 3985-3994

Abstract
We find explicit solutions of Type IIB string theory on R^4/Z_2 corresponding to the classical geometry of fractional D1-branes. From the supergravity solution obtained, we capture perturbative information about the running of the coupling constant and the metric on the moduli space of N=4, D=2 Super Yang Mills.

LU TP 04-13