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Quantum Simulation

Robustness of Off-Axis Electron Vortices in Nonuniform Magnetic Fields

arXiv

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

Year

2026

Paper ID

74133

Status

Preprint

Abstract Read

~2 min

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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.

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Rotational symmetry protects the topological charge of on-axis electron vortices but not of off-axis vortices.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2607.22315 [2] arXiv https://arxiv.org/abs/2607.22315 [3] Publisher https://arxiv.org/abs/2607.22315

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