Time-resolved charge detection with cross-correlation techniques

B. Küng; O. Pfäffli; S. Gustavsson; T. Ihn; K. Ensslin; M. Reinwald; W. Wegscheider

doi:10.1103/PhysRevB.79.035314

Time-resolved charge detection with cross-correlation techniques

Mesoscale and Nanoscale Physics 2009-02-27 v2

Authors: B. Küng , O. Pfäffli , S. Gustavsson , T. Ihn , K. Ensslin , M. Reinwald , W. Wegscheider

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Abstract

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 enables 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 to reduce the current level in the detector and therefore the invasiveness of the detection process and may help to increase the available measurement bandwidth in noise-limited setups.

Keywords

quantum dots and electron transport detector readout electronics gaseous detectors

Cite

@article{arxiv.0810.2406,
  title  = {Time-resolved charge detection with cross-correlation techniques},
  author = {B. Küng and O. Pfäffli and S. Gustavsson and T. Ihn and K. Ensslin and M. Reinwald and W. Wegscheider},
  journal= {arXiv preprint arXiv:0810.2406},
  year   = {2009}
}

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6 pages, 4 figures

Time-resolved charge detection with cross-correlation techniques

Abstract

Keywords

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