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►c) A Rational SUSY Potentialargument
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►►►Figure 18.39.1: Graphs of the first and fourth excited state eigenfunctions of the harmonic oscillator, for , of (18.39.13), in , and those of the rationalpotential of (18.39.19), in , .
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Magnify
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►In §18.39(i) it is seen that the functions, , are solutions of a Schrödinger equation with a rationalpotential energy; and, in spite of first appearances, the Sturm oscillation theorem, Simon (2005c, Theorem 3.3, p. 35), is satisfied.
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K. Yang and M. de Llano (1989)Simple Variational Proof That Any Two-Dimensional Potential Well Supports at Least One Bound State.
American Journal of Physics57 (1), pp. 85–86.
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►Analogues of the original Dunkl operator (the rational case) were introduced by Heckman and Cherednik for the trigonometric case, and by Cherednik for the -case.
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►The solved Schrödinger equations of §18.39(i) involve shape invariantpotentials, and thus are in the family of supersymmetric or SUSYpotentials.
SUSY leads to algebraic simplifications in generating excited states, and partner potentials with closely related energy spectra, from knowledge of a single ground state wave function.
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►EOP’s are the subject of recent work on rational solutions to the fourth Painlevé equation, see Clarkson (2003a) and Marquette and Quesne (2016),where use of Hermite EOP’s makes a connection to quantum mechanics.
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