Operating a quantum pump in a closed circuit
介观与纳米尺度物理
2009-11-11 v3
摘要
During an adiabatic pumping cycle a conventional two barrier quantum device takes an electron from the left lead and ejects it to the right lead. Hence the pumped charge per cycle is naively expected to be . This zero order adiabatic point of view is in fact misleading. For a closed device we can get and even . In this paper a detailed analysis of the quantum pump operation is presented. Using the Kubo formula for the geometric conductance, and applying the Dirac chains picture, we derive practical estimates for~.
引用
@article{arxiv.cond-mat/0512500,
title = {Operating a quantum pump in a closed circuit},
author = {Itamar Sela and Doron Cohen},
journal= {arXiv preprint arXiv:cond-mat/0512500},
year = {2009}
}
备注
19 pages, 8 figs, minor textual corretions, to be published in JPA