Charged black holes in quasitopological gravity coupled to Born-Infeld nonlinear electrodynamics
Phys. Rev. D 113, 124044 – Published 12 June, 2026
DOI: https://doi.org/10.1103/8px4-2pyk
Abstract
We construct static, spherically symmetric black hole solutions in quasitopological gravity (QTG) coupled to Born-Infeld nonlinear electrodynamics. Starting from the spherically reduced action, we derive closed-form expressions for the electric field, the nonlinear Lagrangian, and the metric function, the latter involving hypergeometric functions. We consider specific versions of QTG in which vacuum black holes are regular, and show that, for some of these models, charged black holes develop a curvature singularity at a finite radius in their interior. In contrast, in models such as a Born-Infeld-type QTG, charged black holes remain regular. In this case, however, the de Sitter core of the neutral solution is replaced by an anti–de Sitter core. We also discuss several limiting regimes of these solutions.