Effect of a Very Strong Confinement on the Structures of Low-Lying States of a Three-Electron Quantum Dot**The project supported by National Natural Science Foundation of China, a fund from the National Educational Committee of China and the special fund for the excellent scholar backbones of the universities of Guangzhou City

Abstract

Features of the low-lying states of a three-electron quantum dot under a very strong confinement are investigated by few-body methods. We find that the energy spectra are changed greatly compared with the energy spectra under a weak confinement; and the mechanism producing the magic numbers remains working just as in the case of a weak confinement. Furthermore, the degeneracy law of the energy spectra of the low-lying states and the platform effect of the degeneracy degree in close connection with the uncontinuous change of some macroscopic physical properties of materials are discovered for the first time.