Quantum Anomaly Dissociation of Quasibound States Near the Saddle-Point Ionization Limit of a Rydberg Electron in Crossed Electric and Magnetic Fields

摘要

In the combination of crossed electric and magnetic fields and the Coulombfield of the atomic nucleus the spectrum of the Rydberg electron in thevicinity of the Stark saddle-point are investigated at a quantum mechanicallevel. The results expose a quantum anomaly dissociation: quasibound statesnear and above the saddle-point ionization limit predicted at thesemi-classical level disappear at a quantum mechanical level.