MANY-BODY EFFECTS IN QUANTUM DOTS UNDER MAGNETIC-FIELDS

A theoretical analysis of single electron charging processes in a quan tum dot with under a perpendicular magnetic field is presented in a br oad range of the number of electrons. Exact diagonalizations and an un restricted Hartree-Fock approximation have been used in the low and in termediate field regime to study the addition spectra and the omega--> 0 spectral weight function, which are the magnitudes directly connecte d with single electron capacitance spectroscopy and tunneling experime nts. In the high held regime the quantum dot undergoes a set of intege r charge edge excitations. The results of an exact calculation suggest a simple approach for the study of these excitations.