We report measurements of the cross-correlation between current noise fluctuations in two capacitively coupled quantum dots in the Coulomb blockade regime. The sign of the cross-spectral density is found to be tunable by gate voltage and source-drain bias. Good agreement is found with a model of sequential tunneling through the dots in the presence of inter-dot capacitive coupling.
@article{arxiv.cond-mat/0607280,
title = {Tunable Noise Cross-Correlations in a Double Quantum Dot},
author = {D. T. McClure and L. DiCarlo and Y. Zhang and H. -A. Engel and C. M. Marcus and M. P. Hanson and A. C. Gossard},
journal= {arXiv preprint arXiv:cond-mat/0607280},
year = {2009}
}
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