On the convergence of the usual perturbative expansions
classification
✦ hep-th
keywords
expansionsconvergencepotentialsanalyzeanharmoniccasedifferseigenvalues
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The study of the convergence of power series expansions of energy eigenvalues for anharmonic oscillators in quantum mechanics differs from general understanding, in the case of quasi-exactly solvable potentials. They provide examples of expansions with finite radius and suggest techniques useful to analyze more generic potentials.
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