Correlation effects in vertical gated quantum dots

The influence of the electron-electron correlation on the electronic properties of vertical gated quantum dots with three-dimensional confinement has been studied by the configuration interaction method. We have found that the correlation is essential in the weakly confined electron systems and becomes negligibly small for the strongly confined electrons. We have determined the role of the correlation in the single-electron transport-spectroscopy experiments in the gated quantum dots. The correlation slightly changes the stability diagram, but considerably affects the magnetic-field dependence of the confined-electron energy spectra.