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arXiv 1604.04136math-phmath.MPnlin.SIquant-ph
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弯曲空间中的量子振子和Kepler-Coulomb问题:变形形状不变性、点正则变换和有理扩张

Quantum oscillator and Kepler-Coulomb problems in curved spaces: deformed shape invariance, point canonical transformations, and rational extensions

C. Quesne

摘要:

从几个角度分析了常曲率$d$维空间中的量子振子和Kepler-Coulomb问题。在变形超对称框架下,相应的非线性势表现出变形形状不变性。利用点正则变换方法,将这两个变形的薛定谔方程映射到对应于一些形状不变势的常规薛定谔方程上,这些势的有理扩张是已知的.反点正则变换提供了弯曲空间中振子势和Kepler-Coulomb势的一些有理扩展。详细研究了球上振子和双曲空间中的Kepler-Coulomb势,证明了它们的推广与欧氏空间中已知的推广是一致的。非扩展和扩展的潜力之间的伙伴关系被解释在一个变形的超对称框架。这些扩展的潜力,是等谱的一些nonextended的显示变形形状不变性,这在开普勒-库仑的情况下,也通过翻译的程度的多项式中出现的有理部分分母放大。

英文摘要:

The quantum oscillator and Kepler-Coulomb problems in $d$-dimensional spaces with constant curvature are analyzed from several viewpoints. In a deformed supersymmetric framework, the corresponding nonlinear potentials are shown to exhibit a deformed shape invariance property. By using the point canonical transformation method, the two deformed Schrödinger equations are mapped onto conventional ones corresponding to some shape-invariant potentials, whose rational extensions are well known. The inverse point canonical transformations then provide some rational extensions of the oscillator and Kepler-Coulomb potentials in curved space. The oscillator on the sphere and the Kepler-Coulomb potential in a hyperbolic space are studied in detail and their extensions are proved to be consistent with already known ones in Euclidean space. The partnership between nonextended and extended potentials is interpreted in a deformed supersymmetric framework. Those extended potentials that are isospectral to some nonextended ones are shown to display deformed shape invariance, which in the Kepler-Coulomb case is enlarged by also translating the degree of the polynomial arising in the rational part denominator.

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