Preparing the State of a Black Hole

TL;DR

This paper explores a method to control black hole parameters by irradiating them with waves, leveraging superradiance effects, which could aid in preparing quantum black holes.

Contribution

It introduces a novel mechanism using superradiance to set black hole parameters without direct measurement, advancing quantum black hole preparation techniques.

Findings

Mechanism based on Zel'dovich-Misner superradiance demonstrated.

Potential for precise black hole parameter control.

Implications for quantum black hole research.

Abstract

Measurements of the mass or angular momentum of a black hole are onerous, particularly if they have to be frequently repeated, as when one is required to transform a black hole to prescribed parameters. Irradiating a black hole of the Kerr-Newman family with scalar or electromagnetic waves provides a way to drive it to prescribed values of its mass, charge and angular momentum without the need to repeatedly measure mass or angular momentum throughout the process. I describe the mechanism, which is based on Zel'dovich-Misner superradiance and its analog for charged black holes. It represents a possible step in the development of preparation procedures for quantum black holes.