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Black hole superradiance from Kerr/CFT

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Abstract

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.

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Authors and Affiliations

  1. Center for the Fundamental Laws of Nature, Jefferson Physical Laboratory, Harvard University, Cambridge, MA, 02138, U.S.A.

    Irene Bredberg, Thomas Hartman, Wei Song & Andrew Strominger

  2. Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Wei Song

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  1. Irene Bredberg
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  2. Thomas Hartman
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Correspondence to Thomas Hartman.

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ArXiv ePrint: 0907.3477

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Bredberg, I., Hartman, T., Song, W. et al. Black hole superradiance from Kerr/CFT. J. High Energ. Phys. 2010, 19 (2010). https://doi.org/10.1007/JHEP04(2010)019

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