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Neil Constable McGill I will first give a brief review of how the Bekenstein-Hawking entropy of black holes can be given a microscopic interpretation in terms of D-branes and the open string degrees of freedom living on them. I will then present a recent calculation of the entropy of a particularily enigmatic four dimensional extremal black hole which incorporates the physics of orbifolded field theories and a phenomenon known as fractional branes.
Tuesday, October 24th 2000, 13:15 |