Spatial regions, chaos bound and its violation
arXiv:2305.01878 · doi:10.1016/j.nuclphysb.2023.116212
Abstract
The influence of the angular momentum of the particle on the Lyapunov exponent has been studied. In this paper, we investigate influences of the charge and angular momentum of a particle around non-extremal and extremal Reissner-Nordström black holes with a scalar hair on the exponent, and find spatial regions where the chaos bound is violated for certain values of the black holes' parameters. The exponent is gotten by calculating the eigenvalue of a Jacobian matrix in a phase space. The violation occurs from the nea-horizon regions to certain distances from the event horizons. When the charge or angular momentum of the particle are fixed at certain values, the spatial regions increase with the increase of the hair parameter's value when the black hole's charge is fixed, and with the increase of the black hole's charge when the hair parameter is fixed. For the extremal black hole, the violation can occur very close to the horizon when the particle's charge is large enough.
arXiv comment16 pages, 10 figures
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