2008

Superradiant Instability of Five-Dimensional Rotating Charged AdS Black Holes

Aliev, Alikram N., Delice, Özgür

Understand

We study the instability of small AdS black holes with two independent rotation parameters in minimal five-dimensional gauged supergravity to massless scalar perturbations.

  • We analytically solve the Klein-Gordon equation for low-frequency perturbations in two regions of the spacetime of these black holes: namely, in the region close to the horizon and in the far-region.
  • By matching the solutions in an intermediate region, we calculate the frequency spectrum of quasinormal modes.
  • We show that in the regime of superradiance only the modes of even orbital quantum number undergo negative damping, resulting in exponential growth of the amplitude.

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