Abstract
A method is proposed to compute an eigenfunction and the associated eigenvalue of the Schrödinger operatorH=−Δ+V(x), the eigenvalue being required to be closest to a given numberE. The idea is to use a time-dependent Schrödinger equation with the inhomogeneous term exp(−irE)h to excite the target mode. A device is introduced to avoid exciting remote resonant eigenvalues. Some analysis of the schemes is given and it is shown that the use of extrapolations is effective. Some numerical examples are presented. They indicate that the proposed method produces rather accurate results.
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Appendix of the preprint of the present paper. To be published separately.
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Kuroda, S.T., Suzuki, T. A time-dependent method for computing eigenfunctions and eigenvalues of Schrödinger operators. Japan J. Appl. Math. 7, 231–253 (1990). https://doi.org/10.1007/BF03167843
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DOI: https://doi.org/10.1007/BF03167843