On Black Hole Area Quantization and Echoes

Abstract

In this work we argue that black hole area quantization of Bekenstein and Mukhanov should not give rise to measurable effects in terms of so-called gravitational wave echoes during black hole mergers. We outline that the quantum spectrum of a black hole should be washed out during and after black hole mergers, and hence one should not expect echoes in this scenario. The extreme broadening of the spectrum is due to the large particle emission rate during ringdown. Our results question key assumptions being made in recent literature on this topic.

arXiv comment12 pages, accepted for publication in classical and quantum gravity

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• Echoes from beyond: Detecting gravitational-wave quantum imprints with LISA
• Formation and Stability of Area Quantized Black Holes
• Spectral instability of horizonless compact objects within astrophysical environments
• Signatures of Quantum Gravity in Gravitational Wave Memory
• Quantized Area of the Schwarzschild Black Hole: A non-Hermitian Perspective
• Quasinormal Modes and Hawking Radiation Sparsity of GUP corrected Black Holes in Bumblebee Gravity with Topological Defects
• Gravitational Bound State Perturbations Inside Black Holes and Isospectrality