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arXiv 2304.13629math.APmath-phmath.MP
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具有吸引库仑势和点相互作用的二维 NLS 基态

Two dimensional NLS ground states with attractive Coulomb potential and point interaction

Filippo Boni, Matteo Gallone

AI总结:

本文研究含点相互作用、吸引库仑势与幂型非线性的二维聚焦 NLS,证明次临界情形固定质量基态存在并具有对数奇性与径向对称性,且将存在性推广至临界和超临界情形。

摘要:

我们研究二维情形下一类聚焦非线性 Schrödinger 方程在固定质量时基态的存在性及其性质,该方程包含点相互作用、吸引库仑势和幂型非线性项。我们证明,对于任意负的库仑电荷值、任意正质量值以及任意 L²-次临界幂非线性项,此类基态均存在,并在相互作用所在位置呈现对数奇性。此外,在相差一个相位因子乘法的意义下,它们为正、径向对称且递减。对于限制在 Nehari 流形上的作用量极小元,我们也得到类似结果,从而在 L²-临界和超临界情形中同样获得存在性。

英文摘要:

We study the existence and the properties of ground states at fixed mass for a focusing nonlinear Schrödinger equation in dimension two with a point interaction, an attractive Coulomb potential and a nonlinearity of power type. We prove that for any negative value of the Coulomb charge, for any positive value of the mass and for any L$^2$-subcritical power nonlinearity, such ground states exist and exhibit a logarithmic singularity where the interaction is placed. Moreover, up to multiplication by a phase factor, they are positive, radially symmetric and decreasing. An analogous result is obtained also for minimizers of the action restricted to the Nehari manifold, getting the existence also in the L$^2$-critical and supercritical cases.

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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