Electron Wave Transfer in Coupled Quantum Wires and Its Control by Externally Applied Electric Field

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Abstract
Quantum mechanical electron wave transfer between two quantum wires which are weakly coupled via a thin potential barrier is considered. The transfer efficiency is calculated analytically and numerically for several specified cases of geometrical structures, potential barrier heights and an externally applied electric field. Estimated transfer time is of the order of one picosecond in typical mesoscopic structures. The model in this paper can be used to determine important structure parameters for experiments on an electron directional coupler controlled by an external electric field.