Quantum spectrum of black holes
arXiv:gr-qc/0509038
Abstract
The black hole as the thermodynamical system in equilibrium possesses the periodicity of motion in imaginary time, that allows us to formulate the quasi-classical rule of quantization. The rule yields the equidistant spectrum for the entropy of non-rotating black holes as well as for the appropriately scaled entropy in the case of rotation. We clarify and discuss a role of quasi-normal modes.
5 pages, RevTeX4 class; v2, v3: references added