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gr-qc2026
Note on the Kerr Spinning-Particle Equations of Motion
Joon-Hwi Kim
We implement a probe counterpart of Newman-Janis algorithm, which Wick rotates the all-orders geodesic deviation equation into a part of exact spinning-particle equations of motion…
gr-qc2025
Geodesic deviation to all orders via a tangent bundle formalism
Joon-Hwi Kim
We establish an in-in formalism for geodesic deviation as an alternative to Synge calculus, based on a covariant calculus of differential forms in tangent bundle. This derives the…