A note on the Penrose process in rotating regular black holes
General Relativity and Quantum Cosmology
2025-10-14 v1
Abstract
We investigate the Penrose process of energy extraction in the context of rotating regular black holes. For the Neves-Saa class of regular black hole solutions, which includes the Bardeen, Hayward and Fan-Wang spacetimes as special cases, the extraction efficiency is bounded above by the known value for Kerr spacetime. However, in the case of a new rotating regular black hole which does not have a Schwarzschild singular limit for zero rotation, the extraction efficiency can indeed become very large, as shown in our analysis here.
Cite
@article{arxiv.2510.11364,
title = {A note on the Penrose process in rotating regular black holes},
author = {Anjan Kar and Ayan Dey and Sayan Kar},
journal= {arXiv preprint arXiv:2510.11364},
year = {2025}
}
Comments
18 pages, 9 figures