Multi-terminal transport through semi-conductor quantum dots

摘要

We report on a three-terminal tunneling experiment on a semiconductor quantum dot in the Coulomb blockade regime. The set-up allows us to measure directly the conductance matrix of this closed system. In the weak coupling regime, we can determine the coupling strengths of the dot to its individual leads. The independant fluctuations of these coupling strengths as a function of the electronic state are attributed to fluctuations of the shape of the wave function in the dot.