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arXiv math-ph/0212053math-phcond-matmath.MPquant-ph
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具有周期性点扰动的磁性层

Magnetic layers with periodic point perturbations

P. Exner, K. Nemcova

摘要:

本文研究了一个无自旋量子粒子被限制在具有硬壁的无限平面层中,与周期性点微扰晶格和垂直于该层的均匀磁场相互作用时的光谱性质。假设晶格中含有有限数量的杂质,并且通过晶格的通量是合理的。利用Landau-Zak变换,我们将问题转化为相应的纤维算子的研究,并利用Krein公式进行求解。这就产生了一个明确的描述,可以是绝对连续的或退化的光谱带,这取决于模型的参数。

英文摘要:

We study spectral properties of a spinless quantum particle confined to an infinite planar layer with hard walls which interacts with a periodic lattice of point perturbations and a homogeneous magnetic field perpendicular to the layer. It is supposed that the lattice cell contains a finite number of impurities and the flux through the cell is rational. Using the Landau-Zak transformation, we convert the problem into investigation of the corresponding fiber operators which is performed by means of Krein's formula. This yields an explicit description of the spectral bands which may be absolutely continuous or degenerate, depending on the parameters of the model.

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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