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Abstract: Wald-s formula for black hole entropy, applied to extremal black holes, leadsto the entropy function formalism. We manipulate the entropy computed this wayto express it as the logarithm of the ground state degeneracy of a dual quantummechanical system. This provides a natural definition of the extremal blackhole entropy in the full quantum theory. Our analysis also clarifies therelationship between the entropy function formalism and the Euclidean actionformalism.



Autor: Ashoke Sen

Fuente: https://arxiv.org/



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