Black hole superradiance from Kerr/CFT

By Irene Bredberg, Thomas Hartman, Wei Song, Andrew Strominger. 2009

230 citations recorded by the source corpus.

The superradiant scattering of a scalar field with frequency and angular momentum (ω, m) by a near-extreme Kerr black hole with mass and spin (M, J) was derived in the seventies by Starobinsky, Churilov, Press and Teukolsky. In this paper we show that for frequencies scaled to the superradiant bound the full functional dependence on (ω, m, M, J) of the scattering amplitudes is precisely reproduced by a dual two-dimensional conformal field theory in which the black hole corresponds to a specific thermal state and the scalar field to a specific operator. This striking agreement corroborates a conjectured Kerr/CFT correspondence.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f3dffc5528d537b0603814efc71539c87b17935e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Paolo Pani
2. R. Brito
3. V. Cardoso
4. Thomas Hartman
5. A. Maloney
6. Andrew Strominger
7. D. Hofman
8. Wei Song

In Nuclear and High Energy Physics

1. R. Brito
2. Thomas Hartman
3. Paolo Pani
4. V. Cardoso
5. Andrew Strominger
6. A. Maloney
7. Wei Song
8. D. Hofman

Citations in the corpus

• Warped Conformal Field Theory (2012, methodology): “The scattering cross sections of various fields on Kerr black holes have been matched to a CFT [67] (see also the review [46]), but in the CFT approach this required adding a current algebra and imposing a constraint of the form L0 = J0.”
• Superradiance: Energy Extraction, Black-Hole Bombs and Implications for Astrophysics and Particle Physics (2015, background): “[264] the authors attempted to reproduce the superradiant scattering of a scalar field in a near-extremal Kerr geometry in terms of a dual two-dimensional CFT in which the BH corresponds to a thermal state while the scalar field is dual to a specific operator.”
• Superradiance (2015, methodology): “mplied by the BH rotation even if fermions do not experience superradiance amplication. In the extremal limit, the only modes that are spontaneously emitted are superradiant. This was used in Refs. [92,265] to investigate the microscopic description of superradiance within a string theory and gauge/”
• Holographic derivation of Kerr-Newman scattering amplitudes for general charge and spin (2009, methodology): “The case Q = e = 0 was considered in [4].”
• Near Extremal Kerr Entropy from AdS(2) Quantum Gravity (2009, unknown): “1 acastro@physics.mcgill.ca 2 larsenf@umich.edu”
• Hidden Conformal Symmetry of the Kerr Black Hole (2010, background): “A similar expression for B – which is not needed here – can be found in [6].”