- Letter
Third law of repetitive electric Penrose processes
Phys. Rev. D 113, L061501 – Published 5 March, 2026
DOI: https://doi.org/10.1103/vlgc-y3qg
Abstract
Recently, Ruffini et al. [Phys. Rev. Lett. 134, 081403 (2025).] pointed out that the repetitive Penrose process cannot drain the entire extractable energy of a Kerr black hole. In this Letter, we alternatively point out the charge of a Reissner-Nordström black hole cannot drop down to exactly zero via the repetitive electric Penrose process that is terminated after a finite number of iterative steps, indicating a new thermodynamical third-law analog for the repetitive electric Penrose process.
