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Time-resolved charge detection with cross-correlation techniques

DOI to cite this document:
Küng, B. ; Pfäffli, O. ; Gustavsson, S. ; Ihn, Thomas ; Ensslin, Klaus ; Reinwald, Matthias ; Wegscheider, Werner
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Date of publication of this fulltext: 08 Feb 2010 13:06


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 ...


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