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Three-point Padé resummation of perturbation series for anharmonic oscillators

✍ Scribed by Miloslav Znojil

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 692 KB
Volume: 177
Category: Article
ISSN: 0375-9601
DOI: 10.1016/0375-9601(93)90519-6

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Very accurate summation for the infinite

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We introduce a generalization of Wick-ordering which maps the anharmonic oscillator (AO) Hamiltonian for mass m and coupling h exactly into a "Wick-ordered" Hamiltonian with an effective mass M which is a simple analytic function of h and m. The effective coupling rl = X/M3 is bounded. We transform