A Generalized Monte Carlo Approach for the Analysis ofQuantum-Transport Phenomena in Mesoscopic Systems:Interplay Between Coherence and Relaxation

摘要

A theoretical investigation of quantum-transport phenomena in mesoscopic systems ispresented. In particular, a generalization to “open systems” of the well-knownSemiconductor Bloch equations is proposed. Compared to the conventional Blochtheory, the presence of spatial boundary conditions manifest itself through self-energycorrections and additional source terms in the kinetic equations, which are solved bymeans of a generalized Monte Carlo simulation.The proposed numerical approach isapplied to the study of the scattering-induced suppression of Bloch oscillations insemiconductor superlattices as well as to the analysis of quantum-transport phenomenain double-barrier structures.