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arXiv 2009.04280math.AP
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具有非规范不变二次非线性项的一维周期NLS的$L^2$解全局存在的充要条件

Necessary and sufficient condition for global existence of $L^2$ solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity

Kazumasa Fujiwara, Vladimir Georgiev

AI总结:

该研究针对环面上带非规范不变二次非线性项的一维周期NLS方程,通过分析傅里叶0模与解振荡的相互作用,得出了$L^2$解全局存在的精确充要条件,弥补了此前研究的不足。

摘要:

我们研究环面上具有非规范不变二次非线性项的一维NLS(非线性薛定谔方程)。其柯西问题存在平凡全局解,这类解在空间维度上为常数。此前关于全局解不存在性的研究,仅聚焦于解的傅里叶0模的行为,不足以得到柯西问题全局存在性的精确判据。本文通过研究傅里叶0模与解的振荡之间的相互作用,给出了$L^2$解全局存在的精确判据:即若$L^2$解不同于平凡解,则其先验地不具备全局存在性。

英文摘要:

We study 1D NLS with non-gauge invariant quadratic nonlinearity on the torus. The Cauchy problem admits trivial global solutions which are constant with respect to space. The non-existence of global solutions also has been studied only by focusing on the behavior of the Fourier $0$ mode of solutions. However, the earlier works are not sufficient to obtain the precise criteria for the global existence for the Cauchy problem. In this paper, the exact criteria for the global existence of $L^2$ solutions is shown by studying the interaction between the Fourier $0$ mode and oscillation of solutions. Namely, $L^2$ solutions are shown a priori not to exist globally if they are different from the trivial ones.

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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