D-brane Approach to Black Hole Quantum Mechanics
Abstract
D-brane technology has made it possible to identify and precisely count the degenerate quantum states responsible for the entropy of certain extremal, BPS-saturated black holes. Here we give a Type-II D-brane description of a class of extremal {\it and} non-extremal five-dimensional Reissner-Nordstr\"om solutions. We identify degenerate D-brane configurations that give rise to the Reissner-Nordstr\"om solution and we use this information to do a string theory calculation of the entropy, radiation rate and ``Hawking'' temperature. The results agree perfectly with standard Hawking results for the corresponding nearly extremal Reissner-Nordstr\"om black holes. There is no evidence for ``information loss'' and a framework for reliable calculations of the flow of quantum information between the black hole and the outside world is established.Keywords
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