Speaker: Hajime Fukuda
Title:Aspects of Nonlinear Effect on Black Hole Superradiance
Host: Da Liu
Zoom: https://zoom.us/j/186024391
Abstract:
Under some conditions, light boson fields grow exponentially
around a rotating black hole, called the superradiance instability. We
discuss effects of nonlinear interactions of the boson on the
instability. In particular, we focus on the effect of the particle
production and show that the growth of the boson cloud may be
saturated much before the black hole spin is extracted by the boson
cloud, while the nonlinear interactions also induce the boson
emission. For application, we revisit the superradiant instability of
the standard model photon, axion and hidden photon.
