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arXiv 2109.09482math.APmath-phmath.MP
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具有点缺陷的平面NLSE的基态作为约束能量的极小化子

Ground states for the planar NLSE with a point defect as minimizers of the constrained energy

Riccardo Adami, Filippo Boni, Raffaele Carlone, Lorenzo Tentarelli

摘要:

研究了二维带点缺陷的聚焦亚临界非线性薛定谔方程的基态,定义为固定质量下能量泛函的极小值。我们证明了基态存在的每一个积极的质量和对数奇异性的缺陷。此外,直到乘以恒定相位,它们是正的,径向对称的,并且沿着径向方向减小。为了克服能量空间的不寻常结构所产生的障碍,使标准重排理论的应用变得复杂,我们转向Nehari流形上的作用泛函的极小元的研究,然后与原始问题建立联系。给出了一个关于重排的特殊结果,证明了基态的定性特征。

英文摘要:

We investigate the ground states for the focusing, subcritical nonlinear Schrödinger equation with a point defect in dimension two, defined as the minimizers of the energy functional at fixed mass. We prove that ground states exist for every positive mass and show a logarithmic singularity at the defect. Moreover, up to a multiplication by a constant phase, they are positive, radially symmetric, and decreasing along the radial direction. In order to overcome the obstacles arising from the uncommon structure of the energy space, that complicates the application of standard rearrangement theory, we move to the study of the minimizers of the action functional on the Nehari manifold and then establish a connection with the original problem. An ad hoc result on rearrangements is given to prove qualitative features of the ground states.

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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