The Quantum States and the Statistical Entropy of the Charged Black Hole

Abstract

We quantize the Reissner-Nordström black hole using an adaptation of Kuchař's canonical decomposition of the Kruskal extension of the Schwarzschild black hole. The Wheeler-DeWitt equation turns into a functional Schroedinger equation in Gaussian time by coupling the gravitational field to a reference fluid or dust. The physical phase space of the theory is spanned by the mass, $M$, the charge, $Q$, the physical radius, $R$, the dust proper time, $\tau$, and their canonical momenta. The exact solutions of the functional Schroedinger equation imply that the difference in the areas of the outer and inner horizons is quantized in integer units. This agrees in spirit, but not precisely, with Bekenstein's proposal on the discrete horizon area spectrum of black holes. We also compute the entropy in the microcanonical ensemble and show that the entropy of the Reissner-Nordström black hole is proportional to this quantized difference in horizon areas.

31 pages, 3 figures, PHYZZX macros. Comments on the wave-functional in the interior and one reference added. To appear in Phys. Rev. D

References in corpus (3)

• Black Holes: Classical Properties, Thermodynamics and Heuristic Quantization
• Mass Quantization of the Schwarzschild Black Hole
• Canonical Quantization and the Statistical Entropy of the Schwarzschild Black Hole

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