Journal of Mathematical Sciences

, Volume 165, Issue 1, pp 110–126

Spectral properties of higher order anharmonic oscillators


    • Département de Mathématiques Bâtiment 425Univ Paris-Sud et CNRS
  • M. Persson
    • Department of Mathematical Sciences Aarhus University

DOI: 10.1007/s10958-010-9784-5

Cite this article as:
Helffer, B. & Persson, M. J Math Sci (2010) 165: 110. doi:10.1007/s10958-010-9784-5

We discuss spectral properties of the selfadjoint operator \( \begin{gathered} - \frac{{{d^2}}}{{d{t^2}}} + {\left( {\frac{{{t^{k + 1}}}}{{k + 1}} - \alpha } \right)^2} \hfill \\ \hfill \\ \end{gathered} \) in L2(ℝ) for odd integers k. We prove that the minimum over α of the ground state energy of this operator is attained at a unique point which tends to zero as k tends to infinity. We also show that the minimum is nondegenerate. These questions arise naturally in the spectral analysis of Schrödinger operators with magnetic field. Bibliography: 13 titles. Illustrations: 2 figures.

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© Springer Science+Business Media, Inc. 2010