TY - JOUR
T1 - Superradiant instability and charged scalar quasinormal modes for ( 2 + 1 )-dimensional Coulomb-like AdS black holes from nonlinear electrodynamics
AU - González, P. A.
AU - Rincón, Ángel
AU - Saavedra, Joel
AU - Vásquez, Yerko
N1 - Funding Information:
This work is partially supported by ANID Chile through FONDECYT Grant No. 1210635 (J. S.). The author A. R. acknowledges Universidad de Tarapacá for financial support.
Funding Information:
ANID Chile Fondo Nacional de Desarrollo Cient?fico y Tecnol?gico Universidad de Tarapac?
Publisher Copyright:
© 2021 American Physical Society
PY - 2021/10/15
Y1 - 2021/10/15
N2 - We study the propagation of charged scalar fields in the background of -dimensional Coulomb-like AdS black holes, and we show that such propagation is unstable under Dirichlet boundary conditions. However, all the unstable modes are superradiant and all the stable modes are nonsuperradiant, according with the superradiant condition. Mainly, we show that when the scalar field is charged the quasinormal frecuencies (QNFs) are always complex, contrary to the uncharged case, where for small values of the black hole charge the complex QNFs are dominant, while that for bigger values of the black hole charge the purely imaginary QNFs are dominant.
AB - We study the propagation of charged scalar fields in the background of -dimensional Coulomb-like AdS black holes, and we show that such propagation is unstable under Dirichlet boundary conditions. However, all the unstable modes are superradiant and all the stable modes are nonsuperradiant, according with the superradiant condition. Mainly, we show that when the scalar field is charged the quasinormal frecuencies (QNFs) are always complex, contrary to the uncharged case, where for small values of the black hole charge the complex QNFs are dominant, while that for bigger values of the black hole charge the purely imaginary QNFs are dominant.
UR - http://www.scopus.com/inward/record.url?scp=85117368060&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.104.084047
DO - 10.1103/PhysRevD.104.084047
M3 - Article
AN - SCOPUS:85117368060
VL - 104
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 8
M1 - 084047
ER -