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On the global well-posedness of the quadratic NLS on $$H^1({{\mathbb {T}}}) + L^2({{\mathbb {R}}})$$ H 1 ( T ) + L 2 ( R )
Nonlinear Differential Equations and Applications (NoDEA) ( IF 1.2 ) Pub Date : 2021-01-30 , DOI: 10.1007/s00030-020-00670-8
L. Chaichenets , D. Hundertmark , P. Kunstmann , N. Pattakos

We study the one dimensional nonlinear Schrödinger equation with power nonlinearity \(\left| u \right| ^{\alpha - 1} u\) for \(\alpha \in [1,5]\) and initial data \(u_0 \in H^1({{\mathbb {T}}}) + L^2({{\mathbb {R}}})\). We show via Strichartz estimates that the Cauchy problem is locally well-posed. In the case of the quadratic nonlinearity (\(\alpha = 2\)) we obtain global well-posedness in the space \(C({{\mathbb {R}}}, H^1({{\mathbb {T}}}) + L^2({{\mathbb {R}}}))\) via Gronwall’s inequality.



中文翻译:

关于$$ H ^ 1({{\ mathbb {T}}})+ L ^ 2({{\ mathbb {R}}})$$ H 1(T)+上的二次NLS的全局适定性L 2(R)

我们针对\(\ alpha \ in [1,5] \)和初始数据\(u_0 ,研究具有功率非线性\(\ left | u \ right | ^ {\ alpha-1} u \)的一维非线性Schrödinger方程\ in H ^ 1({{\ mathbb {T}}})+ L ^ 2({{\ mathbb {R}}})\)。我们通过Strichartz估计表明,柯西问题在当地是恰当的。在二次非线性的情况下(\(\阿尔法= 2 \) ),我们得到全球适定性在空间\(C({{\ mathbb {R}}},H ^ 1({{\ mathbb【T }}})+ L ^ 2({{\ mathbb {R}}}))\)通过Gronwall的不等式。

更新日期:2021-01-31
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