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arXiv 1303.7150math-phmath.MPnlin.SIquant-ph
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谐振子有理扩张的新阶梯算子与某些二维系统的超可积性

New ladder operators for a rational extension of the harmonic oscillator and superintegrability of some two-dimensional systems

I. Marquette, C. Quesne

摘要:

构造了一类新的阶梯算子,用于与III型Hermite例外正交多项式相关的谐振子的有理延拓,其特征为偶数$m$ .哈密顿量的本征态分离成相应多项式海森堡代数的$m+1$无限维酉不可约表示。这些阶梯算子被用来构造一个高阶积分的运动的两个超可积的二维系统可分离的笛卡尔坐标。这种系统的多项式代数提供了第一次通过其有限维酉不可约表示的整个频谱的代数推导。

英文摘要:

New ladder operators are constructed for a rational extension of the harmonic oscillator associated with type III Hermite exceptional orthogonal polynomials and characterized by an even integer $m$. The eigenstates of the Hamiltonian separate into $m+1$ infinite-dimensional unitary irreducible representations of the corresponding polynomial Heisenberg algebra. These ladder operators are used to construct a higher-order integral of motion for two superintegrable two-dimensional systems separable in cartesian coordinates. The polynomial algebras of such systems provide for the first time an algebraic derivation of the whole spectrum through their finite-dimensional unitary irreducible representations.

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