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arXiv 0901.1148math-phmath.MPmath.SPquant-ph
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具有表面相互作用的临界薛定谔算子的几何扰动

On geometric perturbations of critical Schrödinger operators with a surface interaction

P. Exner, M. Fraas

摘要:

本文研究了R^3中光滑闭曲面A支持的具有吸引相互作用的奇异薛定谔算子,并分析了它们在临界情形附近的行为,在临界情形下,这种算子具有空的离散谱和阈值共振。特别是,我们表明,如果A是一个球和临界耦合是恒定的,任何足够小的光滑区域保持径向变形产生孤立的本征值。另一方面,对于一般变形,离散谱可能是空的。我们还推导出一个相关的不等式与这些表面的能力。

英文摘要:

We study singular Schrodinger operators with an attractive interaction supported by a closed smooth surface A in R^3 and analyze their behavior in the vicinity of the critical situation where such an operator has empty discrete spectrum and a threshold resonance. In particular, we show that if A is a sphere and the critical coupling is constant over it, any sufficiently small smooth area preserving radial deformation gives rise to isolated eigenvalues. On the other hand, the discrete spectrum may be empty for general deformations. We also derive a related inequality for capacities associated with such surfaces.

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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