2025/07/23 by A. Ianniccari, Ianniccari, A., L. Dal Bianco +3
Engineering · Physics and Astronomy · #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Particle Accelerators and Free-Electron Lasers
paper · pdf · doi:10.48550/arxiv.2507.17732
openalex publication_date 2025/07/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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-2ℓ-1, where ℓ is the multipole of the propagating spherical gravitational wave.