We shall revisit the conventional treatment of open quantum devices based on the Wigner-Function formalism. Our analysis will show that the artificial spatial separation between device active region and external reservoirs - properly defined within a semiclassical simulation scheme - 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 conventional boundary-condition scheme to the Wigner transport equation may produce highly non-physical results, like thermal injection of coherent state superpositions and boundary-driven negative probability distributions.
Quantum-transport simulations with the Wigner-function formalism: Failure of conventional boundary-condition schemes / TAJ D.; GENOVESE L.; ROSSI F.. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 74:6(2006), pp. 1060-1066. [10.1209/epl/i2006-10047-3]
|Titolo:||Quantum-transport simulations with the Wigner-function formalism: Failure of conventional boundary-condition schemes|
|Data di pubblicazione:||2006|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1209/epl/i2006-10047-3|
|Appare nelle tipologie:||1.1 Articolo in rivista|