Pith. sign in

Generalised superradiant scattering

1 Pith paper cite this work. Polarity classification is still indexing.

1 Pith paper citing it
abstract

We analyse the necessary and sufficient conditions for the occurrence of superradiance. Starting with a wave equation we examine the possibility of superradiance in terms of an effective potential and boundary conditions. In particular, we show that the existence of an ergoregion is not sufficient; an appropriate boundary condition, e.g. only ingoing group velocity waves at an event horizon, is also crucial. After applying our scheme to the standard examples of superradiance, we show that analogue models of gravity without an event horizon do not necessarily exhibit superradiance. Particularly, we show that the superradiant phenomenon is absent in purely rotating inviscid fluids with vorticity. We argue that there should be a catalogue of superradiant systems that can be found by focusing on the necessary and sufficient conditions outlined below.

citation-role summary

background 1

citation-polarity summary

fields

gr-qc 1

years

2015 1

verdicts

UNVERDICTED 1

roles

background 1

polarities

background 1

representative citing papers

Superradiance -- the 2020 Edition

gr-qc · 2015-01-26 · unverdicted · novelty 4.0

Black-hole superradiance extracts energy via the ergoregion and can trigger instabilities with applications to dark matter, beyond-Standard-Model physics, and laboratory analogs.

citing papers explorer

Showing 1 of 1 citing paper.

  • Superradiance -- the 2020 Edition gr-qc · 2015-01-26 · unverdicted · none · ref 230 · internal anchor

    Black-hole superradiance extracts energy via the ergoregion and can trigger instabilities with applications to dark matter, beyond-Standard-Model physics, and laboratory analogs.