Conifolds from D-branes

In this note we study the resolution of conifold singularity by D-branes by considering compactification of D-branes on C3/(Z2×Z2). The resulting vacuum moduli space of D-branes is a toric variety which turns out to be a resolved conifold, that is a nodal variety in C4. This has the implication that all the corresponding phases of Type–II string theory are geometrical and are accessible to the D-branes, since they are related by flops.