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arXiv · 2009.02367

Scalar Perturbations of a Single-Horizon Regular Black Hole

Ramin G. Daghigh·Michael D. Green·Jodin C. Morey·Gabor Kunstatter
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Abstract

We investigate the massless scalar field perturbations, including the quasinormal mode spectrum and the ringdown waveform, of a regular black hole spacetime that was derived via the Loop Quantum Gravity inspired polymer quantization of spherical $4$D black holes. In contrast to most, if not all, of the other regular black holes considered in the literature, the resulting nonsingular spacetime has a single bifurcative horizon and hence no mass inflation. In the interior, the areal radius decreases to a minimum given by the Polymerization constant, $k$, and then re-expands into a Kantowski-Sachs universe. We find indications that this black hole model is stable against small scalar perturbations. We also show that an increase in the magnitude of $k$ will decrease the height of the QNM potential and gives oscillations with lower frequency and less damping.

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Ramin G. Daghigh, Michael D. Green, Jodin C. Morey, Gabor Kunstatter. 2020-09-04. Scalar Perturbations of a Single-Horizon Regular Black Hole. https://doi.org/10.1103/physrevd.102.104040

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