Speaker
Description
Rotating black holes provide a unique environment for extracting energy from spacetime rotation through processes occurring inside the ergosphere. In this presentation, I will review the classical Penrose mechanism and its electromagnetic extensions, with particular focus on the electric and magnetic Penrose processes. These mechanisms allow charged particles to gain energy through interactions with external electromagnetic fields, substantially increasing the efficiency of energy extraction compared with the original particle-splitting scenario. I will also discuss the radiative Penrose process, in which radiation reaction and electromagnetic emission contribute to particle acceleration and energy transfer. Finally, I will examine the observational predictions of these mechanisms and their application to various black hole candidates.