https://doi.org/10.1140/epjc/s10052-008-0802-4
Regular Article - Theoretical Physics
Quasinormal modes from potentials surrounding the charged-dilaton black hole
1
Institute of Basic Science and School of Computer Aided Science, Inje University, Gimhae, 621-749, South Korea
2
Department of Physics and Center for Quantum Spacetime, Sogang University, Seoul, 121-742, South Korea
* e-mail: ywkim65@gmail.com
Received:
8
October
2008
Published online:
19
November
2008
We clarify the purely imaginary quasinormal frequencies of a massless scalar perturbation on 3D charged-dilaton black holes. This case is quite interesting, because the step of the potential appears outside the event horizon, similar to the case of the electromagnetic perturbations on large Schwarzschild–anti-de Sitter (AdS) black holes. It turns out that the potential-step type with a massless scalar perturbation provides purely imaginary quasinormal frequencies.
PACS: 04.70.Dy – / 04.60.Kz – / 04.30.Nk –
© Springer-Verlag , 2008