Edilberto Oliveira Silva

Thermodynamic analysis of charged anti-de Sitter black holes with cloud of strings in Einstein-bumblebee gravity via Bekenstein–Hawking and Tsallis entropies

Abstract We investigate the thermodynamic properties of charged anti-de Sitter (AdS) black holes surrounded by a cloud of strings in bumblebee gravity. In this framework, the cloud-of-strings parameter α and the Lorentz-violating parameter ℓ modify the horizon structure, the Hawk...

Thermodynamics and orbital structure of anti-de Sitter black holes in Palatini-inspired nonlinear electrodynamics

Abstract We construct a consistent anti-de Sitter completion of the static and spherically symmetric black-hole solution sourced by the Palatini-inspired nonlinear electrodynamics $$Y^n$$ Y n model. Here, “Palatini-inspired” denotes exclusively a first-order formulation of the el...

Analytical and Numerical Bound-State Analysis of One-Dimensional Time-like Vector Potentials in the Feshbach–Villars Formalism

We analyse one-dimensional bound states of spin-zero particles coupled to external time-like vector potentials within the Feshbach–Villars representation. The study is organised around a practical criterion of physical admissibility that distinguishes genuine bound states from sc...