Superradiance and Instability of Black Holes
arXiv:0711.4184 · doi:10.1143/PTPS.172.11
Abstract
We discuss the relation between the superradiance phenomenon and the instability of rotating black holes in higher dimensions. In particular, we point out that the superradiant instability of a massless scalar field around a simply rotating Kerr-adS black hole implies the gravitational instability of that black hole for tensor-type perturbations.
References added. 13 pages, 3 figures. A talk given at ICGA8 to be published in Prog. Theor. Phys. Supplement
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