Quasinormal modes from potentials surrounding the charged dilaton black hole

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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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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/211544

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0809.1933
 http://arxiv.org/abs/0809.1933
 Eur.Phys.J.C58:617-625,2008
 doi:10.1140/epjc/s10052-008-0802-4

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arXiv