Abstract
Starting from assuming that the electrical zero-bias conductance in a metallic quantum dot may be represented well by the Breit–Wigner model (which, on the other hand, is certainly appropriate for one-atom metallic wires), the strength of the coupling between a metallic parabolic quantum dot and the involved leads is determined for maximum conductance through the dot. In fact, this maximal conductance is calculated and issues related to off-resonant conduction states are discussed.
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