Algebraic Exact Solvability of trigonometric-type Hamiltonians associated to root systems

Details Algebraic Exact Solvability of trigonometric-type Hamiltonians associated to root systems Algebraic Exact Solvability of trigonometric-type Hamiltonians associated to root systems

1998-10-27

arxiv.org/abs/solv-int/9810017v1

Physics

Mathematical Physics

14 pages

Scientific paper

In this article, we study and settle several structural questions concerning the exact solvability of the Olshanetsky-Perelomov quantum Hamiltonians corresponding to an arbitrary root system. We show that these operators can be written as linear combinations of certain basic operators admitting infinite flags of invariant subspaces, namely the Laplacian and the logarithmic gradient of invariant factors of the Weyl denominator. The coefficients of the constituent linear combination become the coupling constants of the final model. We also demonstr ate the $L^2$ completeness of the eigenfunctions obtained by this procedure, and describe a straight-forward recursive procedure based on the Freudenthal multiplicity formula for constructing the eigenfunctions explicitly.

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