Calculations of conductance oscillations in quantum dots

When all 3 dimensions of electron device drop to a nanometer size, a 0-D de vice or a quantum dot appears. In this case the conductance shows oscillati ons with varying gate voltage. In this paper the results of numerical simul ations, which clearly show the above behavior, are presented. The dot condu ctance is calculated with the help of Landauer formula after the Green's fu nction corresponding to device Hamiltonian is evaluated. Coulomb interactio ns are included as the Hartree potential associated with the charge of all particles inside a dot. This farces us to use self-energies which describes interactions between device and leads not only to propagating states but a lso to non-propagating, localized states below the band.