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arXiv · 1706.06479

On the cubic Dirac equation with potential and the Lochak--Majorana condition

Piero D'Ancona·Mamoru Okamoto
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Abstract

We study a cubic Dirac equation on $\mathbb{R}\times\mathbb{R}^{3}$ \begin{equation*} i \partial _t u + \mathcal{D} u + V(x) u = \langle \beta u,u \rangle \beta u \end{equation*} perturbed by a large potential with almost critical regularity. We prove global existence and scattering for small initial data in $H^{1}$ with additional angular regularity. The main tool is an endpoint Strichartz estimate for the perturbed Dirac flow. In particular, the result covers the case of spherically symmetric data with small $H^{1}$ norm. When the potential $V$ has a suitable structure, we prove global existence and scattering for \emph{large} initial data having a small chiral component, related to the Lochak--Majorana condition.

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Piero D'Ancona, Mamoru Okamoto. 2017-06-19. On the cubic Dirac equation with potential and the Lochak--Majorana condition. https://arxiv.org/abs/1706.06479

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