Abstract
AbstractWe shall discuss the role of the contacts as they are modelled in the conventional treatment of quantum devices based on the Wigner‐Function formalism. Our analysis will show that the artificial spatial separation between device active region and external reservoirs is intrinsically incompatible with the non‐local character of quantum mechanics. More specifically, by means of an exactly‐solvable semiconductor model, we shall show that the application of the usual Up‐Wind boundary scheme to the Wigner transport equation may produce highly non‐physical results, like boundary‐driven negative probability distributions. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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