A remarkable spectral feature of the Schrödinger Hamiltonian of the harmonic oscillator perturbed by an attractive δ'-interaction centred at the origin: double degeneracy and level crossing*

Albeverio, SergioFassari, SilvestroRinaldi, Fabio2013-09-112013-09-112013-09-11201310.1088/1751-8113/46/38/385305https://infoscience.epfl.ch/handle/20.500.14299/94554A remarkable spectral feature of the Schrödinger Hamiltonian of the harmonic oscillator perturbed by an attractive δ'-interaction centred at the origin: double degeneracy and level crossing*text::journal::journal article::research article