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Noise Correlations in a Coulomb Blockaded Quantum Dot

Y. Zhang·L. DiCarlo·D. T. McClure·M. Yamamoto·S. Tarucha·C. M. Marcus·M. P. Hanson·A. C. Gossard
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Abstract

We report measurements of current noise auto- and cross-correlation in a tunable quantum dot with two or three leads. As the Coulomb blockade is lifted at finite source-drain bias, the auto-correlation evolves from super-Poissonian to sub-Poissonian in the two-lead case, and the cross-correlation evolves from positive to negative in the three-lead case, consistent with transport through multiple levels. Cross-correlations in the three-lead dot are found to be proportional to the noise in excess of the Poissonian value in the limit of weak output tunneling.

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Y. Zhang, L. DiCarlo, D. T. McClure, M. Yamamoto, S. Tarucha, C. M. Marcus, M. P. Hanson, A. C. Gossard. 2007-03-15. Noise Correlations in a Coulomb Blockaded Quantum Dot. https://doi.org/10.1103/physrevlett.99.036603

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