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Lagrange-mesh calculations and Fourier transform

The Lagrange-mesh method is a very accurate procedure to compute eigenvalues and eigenfunctions of a two-body quantum equation. The method requires only the evaluation of the potential at some mesh points in the configuration space. It is shown that the eigenfunctions can be easily computed in the momentum space by a Fourier transform using the properties of the basis functions. Observables in this space can also be easily obtained.

preprint2011arXivOpen access
Gwendolyn LacroixClaude Semay
physics.comp-ph
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Gwendolyn LacroixClaude Semay

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