Energy extraction from AdS black holes via superradiance

Abstract

Superradiance is known as a wave amplification process caused by rotating or charged black holes. We argue that the superradiance of stationary black holes in asymptotically AdS spacetimes can be characterized by the ability of energy extraction. Specifically, we demonstrate that energy can be extracted from Reissner-Nordström-AdS${}_4$ and Kerr-AdS${}_4$ under appropriate time-dependent boundary conditions at conformal boundaries. This indicates that energy can be extracted from thermal states dual to these black holes by applying appropriate time-dependent sources. We also show that the energy extraction can be realized as a reversible process.

25 pages, 7 figures

References in corpus (8)

• Building an AdS/CFT superconductor
• Gravitational Perturbations of Higher Dimensional Rotating Black Holes: Tensor Perturbations
• Classical instability of Kerr-AdS black holes and the issue of final state
• Gravitational instability of simply rotating AdS black holes in higher dimensions
• Instabilities of Kerr-AdS_5 x S^5 Spacetime
• Driven Holographic CFTs
• Gravitational wave driving of a gapped holographic system
• Time-dependent stabilization in AdS/CFT

Cited by in corpus (7)

• Worldline effective field theory of inspiralling black hole binaries in presence of dark photon and axionic dark matter
• Shadow of quantum extended Kruskal black hole and its super-radiance property
• Shedding new light on the absence of fermionic superradiance and maximal infalling rate of fermions into a black hole
• Scalar Perturbation Around Rotating Regular Black Hole: Superradiance Instability and Quasinormal Modes
• Non-modal effects in black hole perturbation theory: Transient Superradiance
• Hairy black holes in AdS with Robin boundary conditions
• Superradiance of rotating black holes surrounded by dark matter