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Extremal black holes and refined topological strings

QMAP Seminar

Speaker: Kirill Saraikin, Caltech
Location: 3240 MSB
Start time: Fri, Nov 2 2007, 3:10PM

The entropy of the supersymmetric 4d black holes which arise upon compactification of type II superstrings on Calabi-Yau threefolds is related to topological strings, according to the Ooguri-Strominger-Vafa conjecture. I will discuss a generalization of this conjecture for non-supersymmetric, extremal 4d black holes in the same set-up and argue that it involves the one parametric refinement of the topological string introduced by Nekrasov.