Open access
Datum
2010-07-29Typ
- Journal Article
ETH Bibliographie
yes
Altmetrics
Abstract
Charge sensing with quantum point-contacts (QPCs) is a technique widely used in semiconductor quantum-dot research. Understanding the physics of this measurement process, as well as finding ways of suppressing unwanted measurement back-action, are therefore both desirable. In this article, we present experimental studies targeting these two goals. Firstly, we measure the effect of a QPC on electron tunneling between two InAs quantum dots, and show that a model based on the QPC’s shot-noise can account for it. Secondly, we discuss the possibility of lowering the measurement current (and thus the back-action) used for charge sensing by correlating the signals of two independent measurement channels. The performance of this method is tested in a typical experimental setup. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000156496Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
EntropyBand
Seiten / Artikelnummer
Verlag
MDPIThema
Quantum dots; Quantum wires; Noise; Single-electron tunnelingOrganisationseinheit
03439 - Ensslin, Klaus / Ensslin, Klaus
03833 - Wegscheider, Werner / Wegscheider, Werner
03369 - Blatter, Johann W. (emeritus) / Blatter, Johann W. (emeritus)
08835 - Ihn, Thomas (Tit.-Prof.)
02205 - FIRST-Lab / FIRST Center for Micro- and Nanoscience
ETH Bibliographie
yes
Altmetrics