Quantum adiabatic pumping by modulating tunnel phase in quantum dots
Mesoscale and Nanoscale Physics
2016-09-22 v2
Abstract
In a mesoscopic system, under zero bias voltage, a finite charge is transferred by quantum adiabatic pumping by adiabatically and periodically changing two or more control parameters. We obtained expressions for the pumped charge for a ring of three quantum dots (QDs) by choosing the magnetic flux penetrating the ring as one of the control parameters. We found that the pumped charge shows a steplike behavior with respect to the variance of the flux. The value of the step heights is not universal but depends on the trajectory of the control parameters. We discuss the physical origin of this behavior on the basis of the Fano resonant condition of the ring.
Cite
@article{arxiv.1504.00059,
title = {Quantum adiabatic pumping by modulating tunnel phase in quantum dots},
author = {Masahiko Taguchi and Satoshi Nakajima and Toshihiro Kubo and Yasuhiro Tokura},
journal= {arXiv preprint arXiv:1504.00059},
year = {2016}
}
Comments
16 pages, 7 figures