Abstract
We have performed low-temperature conductance measurements on a quantum dot. For zero magnetic field we find transmission resonances in the regions between successive ballistic quantized conductance plateaus. The results of the conductance measurements are compared with single-particle transmission coefficient calculations for the estimated two-dimensional device potential. In accordance with the experimental results, the calculation predicts transmission resonances of similar lineshape and energy spacing. We also include, in a simple but realistic model, the effect of electron - electron interaction.
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