Descripción
Quantum superradiance of a charged scalar field in Reissner-Nordström
spacetime.
Abstract: We analyze the quantum version of charge superradiance for a massless scalar field in Reissner-Nordström spacetime. We compute the expectation
values of the operators associated to the fluxes of charge and energy
from the black hole in the vacuum state which has no particles as past
null infinity. We show that these expectation values are nonvanishing
and, therefore, that there is an outgoing flux of superradiant particles
at future null infinity.
