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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Spectral properties of the two-dimensional Schrodinger Hamiltonian with various solvable confinements in the presence of a central point perturbation
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Spectral properties of the two-dimensional Schrodinger Hamiltonian with various solvable confinements in the presence of a central point perturbation

机译:二维Schrodinger Hamiltonian的光谱特性,具有各种可溶性的扰动中的各种可溶性扰动

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摘要

We study three solvable two-dimensional systems perturbed by a point interaction centered at the origin. The unperturbed systems are the isotropic harmonic oscillator, a square pyramidal potential and a combination thereof. We study the spectrum of the perturbed systems. We show that, while most eigenvalues are not affected by the point perturbation, a few of them are strongly perturbed. We show that for some values of one parameter, these perturbed eigenvalues may take lower values than the immediately lower eigenvalue, so that level crossings occur. These level crossings are studied in some detail.
机译:我们研究了以原产地为中心的点相互作用扰乱的三个可溶性二维系统。 不受干扰的系统是各向同性谐波振荡器,方形金字塔型电位及其组合。 我们研究了扰动系统的光谱。 我们表明,虽然大多数特征值不受点扰动的影响,但其中一些是强烈的扰动。 我们表明,对于一个参数的一些值,这些扰动的特征值可能比立即下肢值较低的值,从而发生水平交叉。 这些水平交叉部分是详细研究的。

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