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arXiv 1502.00128math-phmath.MP
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二维二阶超可积系统的结构关系与Darboux压缩

Structure Relations and Darboux Contractions for 2D 2nd Order Superintegrable Systems

Robin Heinonen, Ernest G. Kalnins, Willard Miller, Eyal Subag

摘要:

二维二次代数是李代数的推广,包括二维二阶超可积系统的对称代数作为特殊情况。超可积系统是经典力学和量子力学中精确可解的物理系统。不同的超可积系统和它们的二次代数可以通过由Inönü-Wigner型李代数压缩导出的几何压缩联系起来。这些几何压缩具有重要的物理和几何意义,如从${\hbar}\to 0$得到量子现象的极限的经典现象和从狭义相对论得到非相对论现象的极限的$c\to \infty$,以及推导得到所有超几何正交多项式作为Racah/Wilson多项式极限的Askey方案。本文给出了抽象非退化和退化二次代数及其压缩代数的结构关系的简化方法。在较早的论文中,我们分类压缩的二阶超可积系统的常曲率空间,并已表明,所有的结果是可导自自由二次代数包含在包络代数的李代数$e(2,{\mathbb C})$在平坦的空间和$o(3,{\mathbb C})$非零常曲率空间。二次代数压缩是由这些李代数的Inönü-Wigner压缩的推广导出的。作为特例,我们得到了超几何正交多项式的Askey格式.在这里,我们完成了这一理论发展的二维超可积系统表明,达布超可积系统的特点也是自由二次代数包含在这些空间的对称代数和他们的收缩也诱导Inönü-维格纳压缩。我们提出的收缩结果表。

英文摘要:

Two-dimensional quadratic algebras are generalizations of Lie algebras that include the symmetry algebras of 2nd order superintegrable systems in 2 dimensions as special cases. The superintegrable systems are exactly solvable physical systems in classical and quantum mechanics. Distinct superintegrable systems and their quadratic algebras can be related by geometric contractions, induced by Inönü-Wigner type Lie algebra contractions. These geometric contractions have important physical and geometric meanings, such as obtaining classical phenomena as limits of quantum phenomena as ${\hbar}\to 0$ and nonrelativistic phenomena from special relativistic as $c\to \infty$, and the derivation of the Askey scheme for obtaining all hypergeometric orthogonal polynomials as limits of Racah/Wilson polynomials. In this paper we show how to simplify the structure relations for abstract nondegenerate and degenerate quadratic algebras and their contractions. In earlier papers we have classified contractions of 2nd order superintegrable systems on constant curvature spaces and have shown that all results are derivable from free quadratic algebras contained in the enveloping algebras of the Lie algebras $e(2,{\mathbb C})$ in flat space and $o(3,{\mathbb C})$ on nonzero constant curvature spaces. The quadratic algebra contractions are induced by generalizations of Inönü-Wigner contractions of these Lie algebras. As a special case we obtained the Askey scheme for hypergeometric orthogonal polynomials. Here we complete this theoretical development for 2D superintegrable systems by showing that the Darboux superintegrable systems are also characterized by free quadratic algebras contained in the symmetry algebras of these spaces and that their contractions are also induced by Inönü-Wigner contractions. We present tables of the contraction results.

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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