Robustness of Off-Axis Electron Vortices in Nonuniform Magnetic Fields

Hui-Dong Huang; Qi Meng; Zhi-Bin Wang; Liang Lu; Jian Chen; Li-Ping Zou

Robustness of Off-Axis Electron Vortices in Nonuniform Magnetic Fields

Accelerator Physics 2026-07-24 v1 Plasma Physics Quantum Physics

Authors: Hui-Dong Huang , Qi Meng , Zhi-Bin Wang , Liang Lu , Jian Chen , Li-Ping Zou

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.

Keywords

off-axis electron vortex nonuniform magnetic field su(1,1) invariant orbital angular momentum glaser lens robust transport

Cite

@article{arxiv.2607.22315,
  title  = {Robustness of Off-Axis Electron Vortices in Nonuniform Magnetic Fields},
  author = {Hui-Dong Huang and Qi Meng and Zhi-Bin Wang and Liang Lu and Jian Chen and Li-Ping Zou},
  journal= {arXiv preprint arXiv:2607.22315},
  year   = {2026}
}