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arXiv · 2507.17732

The Nonlinear Tails in Black Hole Ringdown: the Scattering Perspective

A. Ianniccari·L. Lo Bianco·A. Riotto
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Abstract

Black holes regain their static configuration by emitting ringdown gravitational waves, whose amplitude decays in time following a power law at fixed spatial positions. We show that the nonlinear decay power law may be obtained by simple scattering calculations using the in-in formalism and argue that the nonperturbative law should be $t^{-2\ell-1}$, where $\ell$ is the multipole of the propagating spherical gravitational wave.

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A. Ianniccari, L. Lo Bianco, A. Riotto. 2025-07-23. The Nonlinear Tails in Black Hole Ringdown: the Scattering Perspective. https://arxiv.org/abs/2507.17732

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