THE INFLUENCE OF THE COULOMB INTERACTION ON THE ELECTRONIC-SPECTRUM OF QUANTUM DOTS

The spectral properties of up to four interacting electrons confined within a quasi-one dimensional system of finite length are determined by numerical diagonalization. The ground state energy as a function of the number of the electrons and the lengths of the system is investigated. The energetically lowest lying excitations are identified with vibrational and tunneling modes of the charge distribution. The limits of a dilute, Wigner-type arrangement of the electrons, and a dense, more homogeneous distribution are discussed.