2 papers
hep-th2025
Near-extremal quantum cross-section for charged fields and superradiance
Panos Betzios, Olga Papadoulaki, Yanjun Zhou
We study the scattering and absorption properties of charged scalar fields on a near-extremal Reissner-Nordström black hole background. We show that in this low-temperature regime…
hep-th2020
Black Hole S-matrix for a scalar field
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We describe a unitary scattering process, as observed from spatial infinity, of massless scalar particles on an asymptotically flat Schwarzschild black hole background. In order to…