Analogue of superradiance effect in acoustic black hole in the presence of disclination

TL;DR

This paper explores the acoustic analogue of superradiance in a rotating fluid model of black holes, examining how disclinations affect sound wave amplification in the presence of an ergoregion.

Contribution

It introduces the effect of disclinations on superradiance phenomena in acoustic black holes, extending previous models to include topological defects.

Findings

Disclinations influence the amplification of sound waves.

Superradiance can be enhanced or suppressed depending on the deficit angle.

The presence of disclinations modifies the ergoregion dynamics.

Abstract

In this paper we invstigate the possibility of the acoustic analogue of a phenomenon like superradiance, that is, the amplification of a sound wave by reflection from the ergo-region of a rotating acoustic black hole in the fluid "draining bathtub" model in the presence of a desclination be amplified or reduced in agreement with the value of the deficit angle.