Robustness of Off-Axis Electron Vortices in Nonuniform Magnetic Fields

Abstract:Rotational symmetry protects the topological charge of on-axis electron vortices but not of off-axis vortices. We identify an additional SU(1,1) dynamical invariant that guarantees conservation of their intrinsic orbital angular momentum within the near-axis approximation. First-principles simulations of an off-axis electron vortex traversing a Glaser lens confirm this prediction, establishing a robust transport mechanism in axisymmetric nonuniform magnetic fields.

Accelerator Physics (physics.acc-ph); Plasma Physics (physics.plasm-ph); Quantum Physics (quant-ph)

arXiv:2607.22315 [physics.acc-ph]

(or arXiv:2607.22315v1 [physics.acc-ph] for this version)

https://doi.org/10.48550/arXiv.2607.22315 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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