Gravitational electric-magnetic duality at the light ring and quasinormal mode isospectrality in effective field theories

Ibrahima Bah, Emanuele Berti, Valerio De Luca +2

Black hole perturbations are characterized by a superposition of damped exponentials known as quasinormal modes. In general relativity, the spectra of parity-even and parity-odd qu…