Pair Production in Near Extremal Kerr-Newman Black Holes

Abstract

The spontaneous pair production of charged scalars in a near extremal Kerr-Newman (KN) black hole is analytically studied. It is shown that the existence condition for the pair production is equivalent to the violation of the Breitenlohner-Freedman bound in an AdS${}_2$ space. The mean number of produced pairs in the extremal black hole has a thermal interpretation, in which the effective temperature for the Schwinger effect in the AdS${}_2$ space persistently holds, while the mean number in the near extremal black hole has an additional factor of the Schwinger effect in the Rindler space. In addition, the holographic dual conformal field theory (CFT) descriptions of the charged scalar pair production are respectively realized both in the $J$ and $Q$ pictures in terms of the KN/CFTs correspondence.

13 pages, 3 figures, revtex4

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• CFT Duals for Extreme Black Holes
• Improved Approximations for Fermion Pair Production in Inhomogeneous Electric Fields
• Twofold Hidden Conformal Symmetries of the Kerr-Newman Black Hole
• One-Loop Effective Action and Schwinger Effect in (Anti-) de Sitter Space
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