Abstract
We briefly introduce the basics of quantum dots and charge detection techniques. Interferometry experiments in the quantum Hall regime rely on the use of large quantum dots that are operated as analog of a Fabry-Perot interferometer. Charge detection techniques are a powerful tool that provides additional insight about the internal dynamics of such a system. We discuss how the sensitivity of charge detectors can be further improved by reducing screening and by inducing a localized state in the quantum point contacts’ confinement potential. Exploiting these techniques, we are able to perform fast and well-resolved charge detection of a micron-sized quantum dot in the quantum Hall regime.
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