Optimization of quantized charge pumping using full counting statistics

Loading...
Thumbnail Image

Access rights

openAccess

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2019-01-24

Major/Subject

Mcode

Degree programme

Language

en

Pages

1-6

Series

Physical Review B, Volume 99, issue 3

Abstract

We optimize the operation of single-electron charge pumps using full counting statistics techniques. To this end, we evaluate the statistics of pumped charge on a wide range of driving frequencies using Floquet theory, focusing here on the current and the noise. For charge pumps controlled by one or two gate voltages, we demonstrate that our theoretical framework may lead to enhanced device performance. Specifically, by optimizing the driving parameters, we predict a significant increase in the frequencies for which a quantized current can be produced. For adiabatic two-parameter pumps, we exploit that the pumped charge and the noise can be expressed as surface integrals over Berry curvatures in parameter space. Our findings are important for the efforts to realize high-frequency charge pumping, and our predictions may be verified using current technology.

Description

Keywords

Other note

Citation

Potanina, E, Brandner, K & Flindt, C 2019, ' Optimization of quantized charge pumping using full counting statistics ', Physical Review B, vol. 99, no. 3, 035437, pp. 1-6 . https://doi.org/10.1103/PhysRevB.99.035437