Exponential Corrections to Black Hole Entropy
Abstract
Using the quasilocal properties alone we show that the area spectrum of a black hole horizon must be discrete, independent of any specific quantum theory of gravity. The area spectrum is found to be half-integer spaced with values 8πγℓ_{p}^{2}j where j∈N/2. We argue that if microstate counting is carried out for quantum states residing on the horizon only, correction of exp(-A/4ℓ_{p}^{2}) over the Bekenstein-Hawking area law must arise in black hole entropy.
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