Abstract
The quasinormal mode spectra for gravitational perturbations of black holes in four-dimensional de Sitter and anti-de Sitter space are investigated. The de Sitter case lends itself to approximation by a Pöshcl–Teller potential. The anti-de Sitter case is relevant to the AdS-CFT correspondence in superstring theory. The ADS-CFT correspondence suggests a preferred set of boundary conditions.
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