Three-dimensional magnetohydrodynamics system forced by space-time white noise
Abstract
We consider the three-dimensional magnetohydrodynamics system forced by noise that is white in both time and space. Its complexity due to four non-linear terms makes its analysis very intricate. Nevertheless, taking advantage of its structure and adapting the theory of paracontrolled distributions from \cite{GIP15}, we prove its local well-posedness. A first challenge is to find an appropriate paracontrolled ansatz which must consist of both the velocity and the magnetic fields. Second challenge is that for some non-linear terms, renormalizations cannot be achieved individually; we overcome this obstacle by strategically coupling certain terms together rather than separately. Our proof is also inspired by the work of \cite{ZZ15}.
Keywords
Cite
@article{arxiv.1910.04820,
title = {Three-dimensional magnetohydrodynamics system forced by space-time white noise},
author = {Kazuo Yamazaki},
journal= {arXiv preprint arXiv:1910.04820},
year = {2023}
}
Comments
This is the accepted version by the Electronic Journal of Probability. Its link is here: https://projecteuclid.org/journals/electronic-journal-of-probability/volume-28/issue-none/Three-dimensional-magnetohydrodynamics-system-forced-by-space-time-white-noise/10.1214/23-EJP929.full