Non-linear superradiant instability

One outstanding issue left unresolved in the understanding of superradiant instabilities concerns accurate, long-term nonlinear evolutions of the development of superradiant instabilities around black holes. These are important to verify recent claims that the instability can be understood with linear techniques and to compute accurate gravitational-waveforms from the system. We will provide accurate, long-lasting simulations, to yield the scalar-instability growth and its subsequent saturation by gravitational wave emission, allowing gravitational-wave templates to be generated.