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arXiv 2511.00550math.APmath-phmath.MP
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二维网格上双重非线性Schrödinger归一化基态:存在性结果与奇异极限

Doubly nonlinear Schrödinger normalized ground states on 2D grids: existence results and singular limits

Daniele Barbera, Filippo Boni, Simone Dovetta, Lorenzo Tentarelli

AI总结:

本文研究了二维网格上双重非线性Schrödinger方程归一化基态的存在性与奇异极限,证明了基态的存在与不存在性,并表明网格边长趋于零时基态的分段仿射扩展强收敛于全平面模型的基态。

摘要:

我们研究了在二维正方形网格上具有标准非线性和集中非线性的聚焦双重非线性Schrödinger方程的归一化基态的存在性与奇异极限。首先,我们根据非线性幂的值以及集中非线性所在的顶点集合的结构,给出了此类基态的存在性与不存在性结果。其次,我们证明了当网格中边的长度趋于零时,这些基态的适当分段仿射扩展在$H^1(\R^2)$中强收敛于定义在整个平面上的相应双重非线性模型的基态。这种收敛性既针对仅含标准非线性的极限模型,也针对结合了集中于直线或条带上的标准非线性与奇异非线性的模型得到了证明。

英文摘要:

We investigate the existence and the singular limit of normalized ground states for focusing doubly nonlinear Schrödinger equations with both standard and concentrated nonlinearities on two-dimensional square grids. First, we provide existence and non-existence results for such ground states depending on the values of the nonlinearity powers and on the structure of the set of vertices where the concentrated nonlinearities are located. Second, we prove that suitable piecewise-affine extensions of such states converge strongly in $H^1(\R^2)$ to ground states of corresponding doubly nonlinear models defined on the whole plane as the length of the edges in the grid tends to zero. This convergence is proved both for limit models with standard nonlinearities only and for models combining standard and singular nonlinearities concentrated on a line or on a strip.

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