3 papers
gr-qc2026
Dyonic black holes from dimensional reduction of five-dimensional Einstein-Gauss-Bonnet gravity
Z. Belkhadria, S. Mignemi, F. Paderi
We study the general black hole solutions of dimensionally reduced five-dimensional Einstein-Gauss-Bonnet gravity. The reduced theory contains gravity, electromagnetism and a scala…
gr-qc2025
New model of spontaneous scalarization of black holes induced by curvature and matter
Zakaria Belkhadria, Salvatore Mignemi
We propose a new model of black hole spontaneous scalarization that combines a scalar--Gauss--Bonnet interaction with a non--minimal coupling to a U(1) gauge field (a dark photon o…
gr-qc2024
Mixed scalarization of charged black holes: from spontaneous to non-linear scalarization
Zakaria Belkhadria, Alexandre M. Pombo
Scalarized black holes (BH) have been shown to form dynamically in extended-scalar-tensor theories, either through spontaneous scalarization -- when the BH is unstable against line…