Charged spinning and magnetized test particles orbiting quantum improved charged black holes

Abstract

In the present work, we aimed to investigate the dynamics of spinning charged and magnetized test particles around both electrically and magnetically charged quantum-improved black holes. We derive the equations of motion for charged spinning test particles using the Mathisson-Papapetrou-Dixon ***equations with the Lorentz coupling term. The radius of innermost stable circular orbits (ISCOs), specific angular momentum, and energy for charged spinless, uncharged spinning, and charged spinning test particles around the charged and non-charged quantum-improved black holes are analyzed separately. We found that the quantum parameter increases the maximum spin value, $$s_\textrm{max}$$ s max , which leads to the nonphysical motion (superluminal motion) of the charged spinning test particle. In contrast, the black hole charge decreases its value. We also found that, in contrast to the Reissner Nordström black hole, spinning charged test particles in the quantum-improved charged black hole have higher $$s_\textrm{max}$$ s max ; moreover, positively charged spinning particles can have higher values of $$s_\textrm{max}$$ s max near the extreme black hole cases when compared with uncharged spinning particles. Finally, we investigate the magnetized test particle’s dynamics in the spacetime of a quantum-improved magnetically charged black hole in Quantum Einstein Gravity using the Hamilton–Jacobi equation. We show that the presence of $$\omega $$ ω increases the maximum value of the effective potential and decreases the minimum energy and angular momentum of magnetized particles at their circular orbits. We found an upper constraint in the black hole charge at the ISCO.

Strong gravitational lensing, quasi-periodic oscillations and constraints from EHT observations for quantum-improved charged black hole

“…Additionally, they explicitly highlighted how these corrections lead to introducing the parameter ω. Quantum-improved charged black holes constitute a theoretical framework that integrates the principles of quantum mechanics and general relativity, aiming to enhance our comprehension of the unique characteristics displayed by charged black holes. The static spherically symmetric Quantum-improved charged black hole is described by [32,58]…”

“…Various choices of these physical parameters lead to distinct spacetimes, as follows: The spacetime (7) reduces to that of the Schwarzschild black hole if ω = 0 = Q; quantumimproved Schwarzschild black hole [31] if Q = 0; Reissner-Nordström black hole if Q = 0, ω = 0; and the quantumimproved charged black hole [32,58] when Q = 0, ω = 0. In this section, we discuss the strong gravitational lensing and its various observables for the quantum-improved charged black hole and compare the results with the cases of Schwarzschild black hole, quantum-improved Schwarzschild and Reissner-Nordström black hole.…”