QUANTUM MONTE-CARLO SIMULATION OF TUNNELING DEVICES USING BOHM TRAJECTORIES

A. generalization of the classical Monte Carlo (MC) device simulation technique is proposed to simultaneously deal with quantum-mechanical p hase-coherence effects and scattering interactions in tunneling device s. The proposed method restricts the quantum treatment of transport to the regions of the device where the potential profile significantly c hanges in distances of the order of the de Broglie wavelength of tile carriers (the quantum window). Bohm trajectories associated to time de pendent Gaussian wavepackets are used to simulate the electron transpo rt in the quantum window. Outside this window, the classical ensemble simulation technique is used. Classical and quantum trajectories are s moothly matched at the boundaries of the quantum window according to a criterium of total energy conservation. A simple one-dimensional simu lator for resonant tunneling diodes is presented to demonstrate the fe asibility of our proposal.