Abstract

Numerical simulations using the time dependent quantum dynamics are carried out on the electron wave packet behaviors through a GaAs quantum interference transistor (QUIT). In order to trace the respective electron wave packets passing through the two hyper fine channels of QUIT, an attempt to introduce their relative phase difference results well in solving the equation system of time dependent quantum dynamics in terms of one dimensional finite difference scheme. The performance as QUIT strongly depends on the interference characteristics of two wave packets, and the interference is well controlled with the aid of externally impressed external electric and/or magnetic fields. The simulation results show the possibility that GaAs QUITs are potential devices which operate as 0-1 controller with ultra high speed and accuracy due to the optimum electric and/or magnetic fields. The present QD simulation may contribute to practical designing and fabricating of QUIT devices.

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