Quasinormal modes of a regular black hole with sub-Planckian curvature

TL;DR

This study investigates the quasinormal modes of a regular black hole with a Minkowski core and sub-Planckian curvature, revealing overtone outbursts that could help detect quantum gravity effects and differentiate black hole models.

Contribution

It introduces analysis of QNMs for a regular black hole with a Minkowski core, highlighting overtone outbursts linked to quantum gravity effects, and compares these with other black hole models.

Findings

Pronounced overtone outbursts in QNMs compared to Schwarzschild black hole.

Overtone phenomena are linked to deviations in near-horizon geometry due to quantum effects.

QNMs can potentially serve as tools to detect quantum gravity effects and distinguish black hole types.

Abstract

This paper explores the properties of the quasinormal modes (QNMs) of a regular black hole(BH) characterized by a Minkowski core and sub-Planckian curvature. When focusing on a special case, this regular BH exhibits identical large-scale behavior with the Hayward BH and some loop quantum gravity corrected (LQG-corrected) BH. A notable characteristic of the QNMs in this regular BH is the pronounced outburst of overtones when compared to the Schwarzschild BH (SS-BH). This outburst can be attributed to the deviation from the SS-BH in the near-horizon geometry region due to the quantum gravity effect. Furthermore, we compare the QNM properties of the regular BH with those of the Hayward BH and the LQG-corrected BH. A similar phenomenon of overtone outburst is observed in the modes of the overtone. As a conclusion, the QNMs may be a powerful tool for detecting the quantum gravity effect and distinguishing different BH models.