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gr-qc2021★ 4 cited
On the Mannheim--Kazanas Solution
Marina--Aura Dariescu, Ciprian Dariescu
We are considering the spacetime described by the metric proposed by Mannheim and Kazanas. The effective potential and the circular orbits are discussed. The rotational velocity de…
hep-th2021
Dirac Equation on Kerr--Newman spacetime and Heun functions
Ciprian Dariescu, Marina-Aura Dariescu, Cristian Stelea
By employing a pseudo-orthonormal coordinate-free approach, the Dirac equation for particles in the Kerr--Newman spacetime is separated into its radial and angular parts. In the ma…