Nonadiabatic Electron Manipulation in Quantum-Dot Arrays
介观与纳米尺度物理
2009-11-10 v1 材料科学
摘要
A novel method of coherent manipulation of the electron tunneling in quantum-dots is proposed, which utilizes the quantum interference in nonadiabatic double-crossing of the discrete energy levels. In this method, we need only a smoothly varying gate voltage to manipulate electrons, without a sudden switching-on and off. A systematic design of a smooth gate-pulse is presented with a simple analytic formula to drive the two-level electronic state to essentially arbitrary target state, and numerical simulations for complete transfer of an electron is shown for a coupled double quantum-dots and an array of quantum-dots. Estimation of the manipulation-time shows that the present method can be employed in realistic quantum-dots.
引用
@article{arxiv.cond-mat/0411468,
title = {Nonadiabatic Electron Manipulation in Quantum-Dot Arrays},
author = {Keiji Saito and Yosuke Kayanuma},
journal= {arXiv preprint arXiv:cond-mat/0411468},
year = {2009}
}