ELECTRONIC INTERACTIONS BETWEEN QUANTUM DOTS

Recent experiments aimed at measuring the electronic interactions betw een voltage-tunable quantum dots in which the electron number can be v aried by integer values are summarized. With suitable gate electrodes the quantum dots are defined electrostatically at a GaAs-AlGaAs hetero junction interface. In coupled quantum dots electronic interactions ar e made visible by studying Coulomb blockade oscillations of the static conductance as well as collective resonances of the dynamic conductan ce.