On Quasinormal Modes, Black Hole Entropy, and Quantum Geometry
arXiv:gr-qc/0212126 · doi:10.1103/PhysRevD.67.087502
Abstract
Loop quantum gravity can account for the Bekenstein-Hawking entropy of a black hole provided a free parameter is chosen appropriately. Recently, it was proposed that a new choice of the Immirzi parameter could predict both black hole entropy and the frequencies of quasinormal modes in the large limit, but at the price of changing the gauge group of the theory. In this note we use a simple physical argument within loop quantum gravity to arrive at the same value of the parameter. The argument uses strongly the necessity of having fermions satisfying basic symmetry and conservation principles, and therefore supports SU(2) as the relevant gauge group of the theory.
3 pages, revtex4, no figures, discussion expanded and references added
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