Signature of Non-uniform Area Quantization on Black Hole Echoes

Abstract

A classical black hole is characterized by a horizon that absorbs radiation of all frequencies incident on it. Perturbation of these black holes is well-understood via exponentially damped sinusoids known as quasi-normal modes. Any departure from such classical behavior near the horizon may induce significant modifications in the late time evolution of the perturbation leading to so-called gravitational wave echoes. This work considers the effect of black hole area-quantization on the formation of gravitational wave echoes. We investigate how the resulting echo waveform may depend on various model parameters. Our study opens up a new window to distinguish different models of area quantization using future gravitational wave observations and provides a novel probe to study the near horizon physics.

8 pages, 6 figures

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• Can the abyss swallow gravitational waves or why we do not observe echoes?
• Echoes from beyond: Detecting gravitational-wave quantum imprints with LISA
• Formation and Stability of Area Quantized Black Holes
• Splitting the Echoes of Black Holes in Einstein-nonlinear Electrodynamic Theories
• Signatures of Quantum Gravity in Gravitational Wave Memory
• Horizon quantum geometries and decoherence