Superradiant instabilities for short-range non-negative potentials on Kerr spacetimes and applications

Georgios Moschidis

The wave equation ${\square }_{g_{M,a}}\psi =0$ on subextremal Kerr spacetimes $({\mathcal{M}}_{M,a},g_{M,a})$, $0<|a|<M$, does not admit real mode solutions, as was established by Shlapent…