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hep-th2026
On the integrability of root-Kerr probe dynamics
Sungsoo Kim, Sangmin Lee
In the background of a Kerr-Newman black hole, the motion of a scalar particle is integrable by virtue of an extra conserved charge known as Carter charge. When the particle is end…
hep-th2026
The Diagrammar of Quantum Magnusian
Li Guo, Joon-Hwi Kim, Jung-Wook Kim +3
The logarithm of the time-evolution operator has been termed Magnusian, on account of the fact that its expansion describes the Magnus series. The diagrammatic expansion and comput…
hep-th2026
Universality in Relativistic Spinning Particle Models
Joon-Hwi Kim, Sangmin Lee
We establish an equivalence between massive spinning particle models in four spacetime dimensions coupled to electromagnetism or gravity, within the spin-magnitude-preserving secto…