Electronic structure of many electron quantum dots

In this work we have studied the ground state energies of two dimensional disc-like parabolic quantum dots up to seven electrons by using Spin Adapted Configuration Interaction (SACI) package. This package is written in Mathematica by R. D. Muhandiramge and J. Wang and calculates the energies and wavefunctions of a parabolic quantum dot under the influence of magnetic field.The ground state energies of a six electron quantum dot for different electron densities at zero angular momentum and magnetic field with total spin quantum number number zero and three have been calculated by using the SACI package. Comparison SAC results with the Density Functional Theory and the conventional Configuration Interaction results has proved the accuracy of the method especially for the fully polarized statesAtomic-like properties of quantum dots have been reviewed by investigation the addition energy spectrum in parabolic quantum dots at zero magnetic field up to six electrons. Addition energy has showed maximums for two and six electrons which proves the shell structure of the quantum dots.Moreover in order to examine the magnetic transitions in the ground state of quantum dots electrochemical energy versus magnetic field plots have been reproduced for two, three and four electrons. It has been observed that the total spin and the angular momentum of the system changes with the increasing magnetic field.