A microscopic approach for the simulation of quantum-transport phenomena in systems with open boundaries is proposed. We show that the application of the conventional Wigner-function formalism to this problem leads to unphysical results, like injection of coherent electronic states from the contacts. To overcome such basic limitation, we propose a generalization of the standard Wigner-function formulation, able to properly describe the incoherent nature of carrier injection at the device spatial boundaries. The latter constitutes a quantum mechanical derivation of the phenomenological injection model commonly employed in the simulation of open quantum devices.

Microscopic modelling of open systems: A generalized Wigner-function approach / PROIETTI ZACCARIA, Remo; Iotti, Rita Claudia; Rossi, Fausto. - In: JOURNAL OF COMPUTATIONAL ELECTRONICS. - ISSN 1569-8025. - STAMPA. - 2:(2003), pp. 141-145. [10.1023/B:JCEL.0000011415.34531.b1]

Microscopic modelling of open systems: A generalized Wigner-function approach

PROIETTI ZACCARIA, Remo;IOTTI, Rita Claudia;ROSSI, FAUSTO
2003

Abstract

A microscopic approach for the simulation of quantum-transport phenomena in systems with open boundaries is proposed. We show that the application of the conventional Wigner-function formalism to this problem leads to unphysical results, like injection of coherent electronic states from the contacts. To overcome such basic limitation, we propose a generalization of the standard Wigner-function formulation, able to properly describe the incoherent nature of carrier injection at the device spatial boundaries. The latter constitutes a quantum mechanical derivation of the phenomenological injection model commonly employed in the simulation of open quantum devices.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1659050
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