paper

Algebraic approach to quantum black holes: logarithmic corrections to black hole entropy

arXiv:gr-qc/0210024 · doi:10.1103/PhysRevD.66.104022

Abstract

The algebraic approach to black hole quantization requires the horizon area eigenvalues to be equally spaced. As shown previously, for a neutral non-rotating black hole, such eigenvalues must be -fold degenerate if one constructs the black hole stationary states by means of a pair of creation operators subject to a specific algebra. We show that the algebra of these two building blocks exhibits symmetry, where the area operator generates the U(1) symmetry. The three generators of the SU(2) symmetry represent a {\it global} quantum number (hyperspin) of the black hole, and we show that this hyperspin must be zero. As a result, the degeneracy of the -th area eigenvalue is reduced to for large , and therefore, the logarithmic correction term should be added to the Bekenstein-Hawking entropy. We also provide a heuristic approach explaining this result, and an evidence for the existence of {\it two} building blocks.

15 pages, Revtex, to appear in Phys. Rev. D

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