Quasi-Normal Modes of Loop Quantum Black Holes Formed from Gravitational Collapse

TL;DR

This paper investigates the quasi-normal modes of loop quantum black holes formed from gravitational collapse, analyzing how quantum effects influence observable gravitational wave signals compared to classical black holes.

Contribution

It introduces a detailed study of QNMs in loop quantum black holes with quantum parameters, highlighting potential observational differences from classical black holes.

Findings

Quantum parameters affect QNM frequencies

Differences in QNMs could be detectable by gravitational wave observatories

Quantum effects are negligible for macroscopic black holes

Abstract

In this paper, we study the quasi-normal modes (QNMs) of a scalar field in the background of a large class of quantum black holes that can be formed from gravitational collapse of a dust fluid in the framework of effective loop quantum gravity. The loop quantum black holes (LQBHs) are characterized by three free parameters, one of which is the mass parameter, while the other two are purely due to quantum geometric effects. Among these two quantum parameters, one is completely fixed by black hole thermodynamics and its effects are negligible for macroscopic black holes, while the second parameter is completely free (in principle). In the studies of the QNMs of such LQBHs, we pay particular attention to the difference of the QNMs between LQBHs and classical ones, so that they can be observed for the current and forthcoming gravitational wave observations, whereby place the LQBH theory directly under the test of observations.