Abstract
Perturbations in one-dimensional systems; Bender–Wu method for the anharmonic oscillator; Feynman–Hellmann and virial theorems; “nocrossing theorem”; external and internal perturbations in hydrogen-like ions.
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d’Emilio, E., Picasso, L.E. (2017). Perturbations to Energy Levels. In: Problems in Quantum Mechanics. UNITEXT for Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-53267-7_12
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DOI: https://doi.org/10.1007/978-3-319-53267-7_12
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