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arXiv · 2012.01535

Local well-posedness for the Landau-Lifshitz equation with helicity term

Ikkei Shimizu
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Abstract

We consider the initial value problem for the Landau-Lifshitz equation with helicity term (chiral interaction term), which arises from the Dzyaloshinskii-Moriya interaction. We prove that it is well-posed locally-in-time in the space $\bar{k} +H^s$ for $s\ge 3$ with $s\in \mathbb{Z}$ and $\bar{k}={}^t(0,0,1)$. We also show that if we further assume that the solution is homotopic to constant maps, then local well-posedness holds in the space $\bar{k} + H^s$ for $s>2$ with $s\in \mathbb{R}$. Our proof is base on the analysis via the modified Schr\"odinger map equation.

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Ikkei Shimizu. 2020-12-02. Local well-posedness for the Landau-Lifshitz equation with helicity term. https://doi.org/10.1063/5.0087308

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