Branch-point structure and the energy level characterization of avoided crossings

DOI10.1063/1.533144zbMath0978.81026OpenAlexW2048585496MaRDI QIDQ2737817

John R. Walkup, Martin L. Dunn, D. K. Watson

Publication date: 30 August 2001

Published in: Journal of Mathematical Physics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1063/1.533144

zbMATH Keywords

perturbation seriescomplex parameter-planediamagnetic hydrogen problemhidden crossingssquare-root branch points

Mathematics Subject Classification ID

Perturbation theories for operators and differential equations in quantum theory (81Q15) (2)-body potential quantum scattering theory (81U05)

Cites Work

• Hermite-Padé approximation (basic notions and theorems)
• Avoided level crossings and Riemann sheet structure

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