- Journal Article
Rights / licenseCreative Commons Attribution 3.0 Unported
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. Show more
Journal / seriesEntropy
Pages / Article No.
SubjectQuantum dots; Quantum wires; Noise; Single-electron tunneling
Organisational unit03439 - Ensslin, Klaus / Ensslin, Klaus
03833 - Wegscheider, Werner / Wegscheider, Werner
03369 - Blatter, Johann W. / Blatter, Johann W.
08835 - Ihn, Thomas (Tit.-Prof.)
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