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- W2041289746 abstract "The eigenvalue problem in of Schrödinger operators with a polynomial perturbation has been replaced by one corresponding to the system confined in a box with impenetrable walls. It is shown that the Dirichlet and the von Neumann problems in generate upper and lower bounds, respectively, to the eigenvalues of the unbounded system. To illustrate the method, rapidly converging two-sided bounds for the energy levels of two- and three-well oscillators are presented, using simple trigonometric basis functions." @default.
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- W2041289746 title "Converging bounds for the eigenvalues of multiminima potentials in two-dimensional space" @default.
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- W2041289746 doi "https://doi.org/10.1088/0305-4470/29/21/027" @default.
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