Dirac quasinormal modes of Chern-Simons and BTZ black holes with torsion
Date
Authors
BECAR COLLAO, RAMÓN ALENN
Becar, Ramon
Gonzalez, P. A.
Vasquez, Y.
Becar, Ramon
Gonzalez, P. A.
Vasquez, Y.
Authors
Date
Datos de publicación:
10.1103/PhysRevD.89.023001
Keywords
Chern-Simons theory - BTZ black holes - quasinormal modes - torsion - Dirac fields
Collections
Abstract
We study Chern-Simons black holes in d dimensions and we calculate analytically the quasinormal modes of fermionic perturbations. Also, we consider as background the five-dimensional Chern-Simons black hole with torsion and the BTZ black hole with torsion. We have found that the quasinormal modes depend on the highest power of curvature present in the Chern-Simons theory, such as that which occurs for the quasinormal modes of scalar perturbations. We also show that the effect of the torsion is to modify the real part of the quasinormal frequencies, which modify the oscillation frequency of the field for the five-dimensional case. However, for the BTZ black hole with torsion, the effect is to modify the imaginary part of these frequencies, that is, the relaxation time for the decay of the black hole perturbation. The imaginary part of the quasinormal frequencies is negative, which guarantees the stability of these black holes under fermionic field perturbations.
Description
Keywords
Chern-Simons theory , BTZ black holes , quasinormal modes , torsion , Dirac fields
Citation
10.1103/PhysRevD.89.023001