A Ricci-flat metric on D-brane orbifolds
Koushik Ray
Abstract
We study issues pertaining to the Ricci-flatness of metrics on orbifolds resolved by D-branes. We find a Kähler metric on the three-dimensional orbifold 3/3, resolved by D-branes, following an approach due to Guillemin. This metric is not Ricci-flat for any finite value of the blow-up parameter. Conditions for the envisaged Ricci-flat metric for finite values of the blow-up parameter are formulated in terms of a correction to the Kähler potential. This leads to an explicit construction of a Ricci-flat Kähler metric on the resolved orbifold. The correction can be interpreted as a part of the superspace-interaction in the corresponding gauged linear sigma-model.
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