TRANSMISSION THROUGH AN INTERACTING QUANTUM-DOT IN THE COULOMB-BLOCKADE REGIME

The influence of electron-electron (e-e) interactions on the transmiss ion through a quantum dot is investigated numerically for the Coulomb blockade regime. For vanishing magnetic fields, the conductance peak h eight statistics is found to be independent of the interactions streng th. It is identical to the statistics predicted by constant-interactio n single-electron random matrix theory and agrees well with recent exp eriments. However, in contrast to these random matrix theories, our ca lculations reproduce the reduced sensitivity to magnetic flux observed in many experiments. The relevant physics is traced to the short-rang e Coulomb correlations providing thus a unified explanation for the tr ansmission statistics as well as for the large conductance peak spacin g fluctuations observed in other experiments.