Black holes with a single Killing vector field: black resonators

Understand

We numerically construct asymptotically anti-de Sitter (AdS) black holes in four dimensions that contain only a single Killing vector field.

• These solutions, which we coin black resonators, link the superradiant instability of Kerr-AdS to the nonlinear weakly turbulent instability of AdS by connecting the onset of the superradiance instability to smooth, horizonless geometries called geons.
• Furthermore, they demonstrate non-uniqueness of Kerr-AdS by sharing asymptotic charges.
• Where black resonators coexist with Kerr-AdS, we find that the black resonators have higher entropy.