Quantised charge pumping through multiple quantum dots
介观与纳米尺度物理
2007-05-23 v1
摘要
We study electron pumping through a system of barriers, whose heights are deformed adiabatically. We derive a simple formula for the pumped charge in terms of the total reflection and transmission amplitudes and phases. The pumped charge increases with the number of barriers () and shows an interesting step-like behaviour, with the steps appearing at integer values of . The pumped charge also tends towards quantisation with the increase of the amplitude of the time-varying potential. The value of the quantised pumped charge is shown to be correlated to the discontinuity of the reflection phase.
引用
@article{arxiv.cond-mat/0307324,
title = {Quantised charge pumping through multiple quantum dots},
author = {Argha Banerjee and Sourin Das and Sumathi Rao},
journal= {arXiv preprint arXiv:cond-mat/0307324},
year = {2007}
}
备注
Latex, 4 pages, 6 figures