Quasinormal modes of quantum-corrected black holes

In this paper, we investigate the quasinormal mode (QNM) spectra for the scalar perturbation over the quantum-corrected black hole (BH) known as the quantum Oppenheimer-Snyder (qOS) BH. The fundamental modes of the qOS BH exhibit two key properties. First, there is a nonmonotonic behavior concerning the quantum-corrected parameter for zero multipole number. Second, the quantum gravity effects result in slower decay modes. For higher overtones, a significant deviation becomes evident between the quasinormal frequencies (QNFs) of the qOS and Schwarzschild BHs. The intervention of quantum gravity corrections induces a significant outburst of overtones. This outburst of these overtones can be attributed to the distinctions near the event horizons between the Schwarzschild and qOS BHs. Therefore, overtones can serve as a means to probe physical phenomena or disparities in the vicinity of the event horizon.