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MHS equilibria in the non-resistive limit to the randomly forced resistive magnetic relaxation equations

MHS equilibria in the non-resistive limit to the randomly forced resistive magnetic relaxation equations

来源:Arxiv_logoArxiv
英文摘要

We consider randomly forced resistive magnetic relaxation equations (MRE) with resistivity $\kappa>0$ and a force proportional to $\sqrt{\kappa}\ $ on the flat $d$-torus $\mathbb{T}^{d}$ for $d\geq 2$. We show the path-wise global well-posedness of the system and the existence of the invariant measures, and construct a random magnetohydrostatic (MHS) equilibrium $B(x)$ in $H^{1}(\mathbb{T}^{d})$ with law $D(B)=\mu$ as a non-resistive limit $\kappa\to 0$ of statistically stationary solutions $B_{\kappa}(x,t)$. For $d=2$, the measure $\mu$ does not concentrate on any compact sets in $H^{1}(\mathbb{T}^{2})$ with finite Hausdorff dimension. In particular, all realizations of the random MHS equilibrium $B(x)$ are almost surely not finite Fourier mode solutions.

Ken Abe、In-Jee Jeong、Federico Pasqualotto、Naoki Sato

物理学

Ken Abe,In-Jee Jeong,Federico Pasqualotto,Naoki Sato.MHS equilibria in the non-resistive limit to the randomly forced resistive magnetic relaxation equations[EB/OL].(2025-06-09)[2025-06-30].https://arxiv.org/abs/2506.08394.点此复制

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