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Charge Emission from Near-Extremal Charged Black Holes
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Using the symmetry of the near-horizon geometry and applying quantum field theory of a complex scalar field, we study the spontaneous pair production of charged scalars from near-extremal rotating, electrically and/or magnetically charged black holes. Analytical expressions for pair production, vacuum persistence and absorption cross section are found, and the spectral distribution is given a thermal interpretation. The pair production in near-extremal black holes has a factorization into the Schwinger effect in AdS and Schwinger effect in Rindler space, measuring the deviational from extremality. The associated holographical correspondence is confirmed at the 2-point function level by comparing the absorption cross section ratio as well as the pair production rate both from the gravity and the conformal field theories. The production of monopoles is discussed.
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Schwinger instability, modular flow, and holographic entropy for near-extremal charged BTZ black hole
A semiclassical study of charged pair creation and horizon entropy in near-extremal charged BTZ, whose central alignment claim is not actually established by the calculations.
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