Stark and field-born resonances of an open square well in a static external electric field

摘要

The resonance positions,widths(inverse lifetimes),and wave functions of a square-potential well in the presence of a static electric field are calculated by using the outgoing boundary conditions.Our study concentrates on the field-born states that,unlike the well-known Stark resonances,are not associated with the field-free bound states.The effect of a lower cutoff of the static field on the field-born resonance phenomena is studied.The feasibility of experiments,where the isolated long-lived and overlapping short-lived field-born resonances can be explored,is discussed.