Confined Penrose process with charged particles

TL;DR

This paper models the energy growth of charged particles near a black hole using a confined Penrose process with a reflective boundary, showing energy amplification that asymptotes to a finite limit without instability.

Contribution

It introduces a charged particle decay process with confinement by a mirror, demonstrating energy amplification and bounded growth near a charged black hole.

Findings

Energy of particles increases with each decay event.

Energy growth asymptotes to a finite value.

No instability occurs in the system.

Abstract

We show that kinematics of charged particles allows us to model the growth of particles' energy by consecutive particle-splits, once a spherical mirror as a perfectly reflective boundary is placed outside a charged black hole. We consider a charged version of the Penrose process, in which a charged particle decays into two fragments, one of them has negative energy and the other has positive energy that is larger than that of the parent particle. The confinement system with the mirror makes the particles' energy amplified each time a split of the parent particle occurs. Thus, the energy is a monotonically increasing function of time. However, the energy does not increase unboundedly, but rather asymptotes to a certain finite value, implying no instability of the system in this respect.