Quantum superradiance on static black hole space-times
Visakan Balakumar, Rafael P. Bernar, Luis C. B. Crispino, Elizabeth, Winstanley
TL;DR
This paper investigates quantum superradiance in static charged black hole spacetimes, demonstrating that the vacuum state emits a nonthermal flux of particles through superradiant modes, revealing quantum effects analogous to classical superradiance.
Contribution
It introduces the quantum analogue of classical superradiance for a charged scalar field on static black holes, showing nonthermal particle emission from the vacuum state.
Findings
Outgoing particle flux observed at future null infinity
Emission occurs only in superradiant modes
The radiation is nonthermal in nature
Abstract
We study the quantum analogue of the classical process of superradiance for a massless charged scalar field on a static charged black hole space-time. We show that an "in" vacuum state, which is devoid of particles at past null infinity, contains an outgoing flux of particles at future null infinity. This radiation is emitted in the superradiant modes only, and is nonthermal in nature.
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