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arXiv physics/9704025math-phmath.MP
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从雅可比矩阵哈密顿量导出格林矩阵

Green's matrix from Jacobi-matrix Hamiltonian

B. Kónya, G. Lévai, Z. Papp

摘要:

我们提出了两种方法来确定格林矩阵的问题,承认汉密尔顿有无限对称三对角(即雅可比)矩阵形式的一些基础表示。除了来自雅可比矩阵的递推关系外,第一种方法还需要基的第一个元素之间的格林算子的矩阵元素。在第二种方法中,递推关系直接用连分式求解,并将解解析地延拓到整个复平面上。这两种方法都说明了非平凡的,但可计算的D维库仑格林矩阵的例子。我们也给出了D维谐振子的相应公式。

英文摘要:

We propose two ways for determining the Green's matrix for problems admitting Hamiltonians that have infinite symmetric tridiagonal (i.e. Jacobi) matrix form on some basis representation. In addition to the recurrence relation comming from the Jacobi-matrix, the first approach also requires the matrix elements of the Green's operator between the first elements of the basis. In the second approach the recurrence relation is solved directly by continued fractions and the solution is continued analytically to the whole complex plane. Both approaches are illustrated with the non-trivial but calculable example of the D-dimensional Coulomb Green's matrix. We give the corresponding formulas for the D-dimensional harmonic oscillator as well.

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