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arXiv quant-ph/0301109quant-ph
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Schrodinger方程的离散超对称性与非局部精确可解势

Discrete supersymmetries of the Schrodinger equation and non-local exactly solvable potentials

Boris F. Samsonov, A. A. Suzko

摘要:

利用Hilbert空间$L^2$和$\ell^{2}$之间的同构,我们考虑在离散基上具有三对角矩阵表示(Jacobi矩阵)的Hamilton算子,并将特征值问题归结为求解一个三项差分方程。利用交织算子的技巧构造了一类新的精确可解Jacobi矩阵族。结果表明,任何由此获得的雅可比矩阵产生一个新的精确可解的非局部势的薛定谔方程。我们还表明,我们的方法的代数结构对应于超对称性。引入了作用在空间$\ell^{2}\times \ell^{2} $中的超荷算子,它与超哈密顿量的矩阵形式一起封闭了最简单的超代数。

英文摘要:

Using an isomorphism between Hilbert spaces $L^2$ and $\ell^{2}$ we consider Hamiltonians which have tridiagonal matrix representations (Jacobi matrices) in a discrete basis and an eigenvalue problem is reduced to solving a three term difference equation. Technique of intertwining operators is applied to creating new families of exactly solvable Jacobi matrices. It is shown that any thus obtained Jacobi matrix gives rise to a new exactly solvable non-local potential of the Schroedinger equation. We also show that the algebraic structure underlying our approach corresponds to supersymmetry. Supercharge operators acting in the space $\ell^{2}\times \ell^{2} $ are introduced which together with a matrix form of the superhamiltonian close the simplest superalgebra.

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