Ringing of Rapidly Rotating Black Holes in Higher-derivative GravityConfirmed

by Simon Maenaut (University of Copenhagen)

Thursday Apr 30, 2026, 1:00 PM → 2:30 PM America/Toronto

PI/4-400 - Space Room (Perimeter Institute for Theoretical Physics)

Within the Effective Field Theory approach to gravity, deviations from General Relativity can be systematically described by higher-curvature operators. However, computing the resulting corrections to black hole quasinormal mode spectra remains challenging in the rapidly rotating regime, where perturbative expansions in the spin break down. Making use of recently constructed numerical rotating black hole solutions, we computed scalar quasinormal mode frequency shifts at leading order for scalar Gauss-Bonnet, dynamical Chern-Simons and Cubic Riemann corrections. We employed a pseudo-spectral collocation method to solve the perturbation equations on these backgrounds, enabling accurate computation across a broad parameter range. We observed that corrections to certain modes grow significantly as the spin approaches the near-extremal regime.