Zeros of eigenfunctions of some anharmonic oscillators
2008 (English)In: Annales de l'Institut Fourier, ISSN 0373-0956, Vol. 58, no 2, 603-624 p.Article in journal (Refereed) Published
We study complex zeros of eigenfunctions of second order linear differential operators with real even polynomial potentials. For potentials of degree 4, we prove that all zeros of all eigenfunctions belong to the union of the real and imaginary axes. For potentials of degree 6, we classify eigenfunctions with finitely many zeros, and show that in this case too, all zeros are real or pure imaginary.
Place, publisher, year, edition, pages
2008. Vol. 58, no 2, 603-624 p.
IdentifiersURN: urn:nbn:se:su:diva-15834ISI: 000256687000008OAI: oai:DiVA.org:su-15834DiVA: diva2:182354