Resonance states of two-electron quantum dots

Abstract

Autoionizing resonance states of two-electron quantum dots are studied by using the effective-mass complex-eigenvalue equation approach. It is shown that two-electron quantum dots may have very rich spectra of resonance states. The number of them and their lifetimes depend strongly on the dot size. It is observed that a resonance state may change its character from Feshbach to shape type with the dot size decreasing. Since the resonance states may have very long lifetimes they should not be neglected in the description of transport processes in quantum dots.