Wronskian method and the Schrödinger eigenvalue march

Details Wronskian method and the Schrödinger eigenvalue march Wronskian method and the Schrödinger eigenvalue march

2011-10-23

arxiv.org/abs/1110.5070v1

Physics

Quantum Physics

Scientific paper

We compare the Wronskian method (WM) and the Schr\"odinger eigenvalue march or canonical function method (SEM--CFM) for the calculation of the energies and eigenfunctions of the Schr\"odinger equation. The Wronskians between linearly independent solutions of the Schr\"odinger equation provide a rigorous basis for some of the assumptions of the SEM-CFM, like, for example, the concept of "saturation". We compare the performance of both approaches on a simple one-dimensional model and suggest that taking into account the asymptotic behaviour of the wavefunction (as is already done in the WM) may make the SEM-CFM more efficient from a numerical point of view.

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