Quasi-exactly solvable quartic: elementary integrals and asymptotics

preprint2011arXivOpen access

Abstract

We study elementary eigenfunctions y=p exp(h) of operators L(y)=y"+Py, where p, h and P are polynomials in one variable. For the case when h is an odd cubic polynomial, we found an interesting identity which is used to describe the spectral locus. We also establish some asymptotic properties of the QES spectral locus.

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