Quasinormal modes from potentials surrounding the charged dilaton black hole
arXiv:0809.1933 · doi:10.1140/epjc/s10052-008-0802-4
Abstract
We clarify the purely imaginary quasinormal frequencies of a massless scalar perturbation on the 3D charged-dilaton black holes. This case is quite interesting because the potential-step appears outside the event horizon similar to the case of the electromagnetic perturbations on the large Schwarzschild-AdS black holes. It turns out that the potential-step type provides the purely imaginary quasinormal frequencies, while the potential-barrier type gives the complex quasinormal modes.
19 pages, 8 figures
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