Superradiance: Axionic couplings and plasma effects
Superradiance: Axionic couplings and plasma effects
Spinning black holes can transfer a significant fraction of their energy to ultralight bosonic fields via superradiance, condensing them in a corotating structure or ``cloud.'' This mechanism turns black holes into powerful particle detectors for bosons with extremely feeble interactions. To explore its full potential, the couplings between such particles …