Time-resolved charge detection with cross-correlation techniques

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.12736

Küng, B. ; Pfäffli, O. ; Gustavsson, S. ; Ihn, Thomas ; Ensslin, Klaus ; Reinwald, Matthias ; Wegscheider, Werner

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Veröffentlichungsdatum dieses Volltextes: 08 Feb 2010 13:06

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Zusammenfassung

We present time-resolved charge-sensing measurements on a GaAs double quantum dot with two proximal quantum point-contact (QPC) detectors. The QPC currents are analyzed with cross-correlation techniques, which enable us to measure dot charging and discharging rates for significantly smaller signal-to-noise ratios than required for charge detection with a single QPC. This allows us to reduce the ...