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arXiv 2603.02839math.DS
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可数周期解的洛伦兹力方程在时间依赖电流下的情况

Countable periodic solutions of the Lorentz force equation under a time-dependent current

Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院);University of Chinese Academy of Sciences(中国科学院大学);Chinese Academy of Sciences’ Reliability Assurance Center(中国科学院可靠性保障中心)

Ka Xie, Pengcheng Xu, Zuohuan Zheng

AI总结:

本文研究了时间依赖电流下洛伦兹力方程的可数周期解,通过梅林科夫方法证明了存在一个与电流周期一致的谐波径向周期解,并指出其他解为亚谐波解。

摘要:

本文研究了在由带有小谐波调制的电流导线产生的电磁场中,带电粒子受洛伦兹力方程支配的共振动力学。当被视为具有周期性扰动的哈密顿系统时,通过梅林科夫方法分析了未扰动系统中周期轨道的共振。证实了存在恰好一个谐波径向周期解,其周期为T₁,与电流的周期一致。此外,任何其他径向周期解必须是亚谐波解,其周期为nT₁(n>1的整数),且每个n最多有一个这样的解。动态上,这些存活的周期轨道对应于将相空间划分并全局约束粒子径向运动的不变圆柱体。

英文摘要:

The resonant dynamics of a charged particle, governed by the Lorentz force equation in an electromagnetic field generated by a current-carrying wire with a small harmonic modulation, is considered in this study. When regarded as a Hamiltonian system with periodic perturbation, the resonance of periodic orbits in the unperturbed system is analyzed by the Melnikov method. The existence of exactly one harmonic radial periodic solution with period $T_1$ is confirmed, matching the period of the current. Moreover, it is established that any other radial periodic solution must be subharmonic with period $nT_1$ for some integer $n > 1$, with at most one such solution for each $n$. Dynamically, these surviving periodic orbits correspond to invariant cylinders that partition the phase space and globally confine the particle's radial motion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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