A multi-physics structure-preserving integrator with uniform error bounds for relativistic charged-particle dynamics under strong magnetic fields

Mengting Hu; Yifa Tang; Bin Wang

A multi-physics structure-preserving integrator with uniform error bounds for relativistic charged-particle dynamics under strong magnetic fields

Numerical Analysis 2026-07-27 v1

Authors: Mengting Hu , Yifa Tang , Bin Wang

Abstract

In this paper, we develop an explicit multi-physics structure-preserving Strang splitting scheme for a four-dimensional relativistic charged-particle dynamical system in the presence of a strong magnetic field under the maximal ordering scaling. The proposed scheme not only preserves volume, energy, and Lorentz invariance, but also yields second-order uniform error bounds for the position and the parallel velocity component. We present rigorous theoretical proofs for these geometric properties and the error convergence, which are subsequently validated by several numerical experiments.

Keywords

structure-preserving integrator relativistic charged particle strong magnetic field strang splitting uniform error bound lorentz invariance

Cite

@article{arxiv.2607.24058,
  title  = {A multi-physics structure-preserving integrator with uniform error bounds for relativistic charged-particle dynamics under strong magnetic fields},
  author = {Mengting Hu and Yifa Tang and Bin Wang},
  journal= {arXiv preprint arXiv:2607.24058},
  year   = {2026}
}