Noise Correlations in a Coulomb-Blockaded Quantum Dot

Yiming Zhang, L. DiCarlo, D. T. McClure, M. Yamamoto, S. Tarucha, C. M. Marcus, M. P. Hanson, A. C. Gossard
2007 Physical Review Letters  
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
more » ... of the Poissonian value in the limit of weak output tunneling.
doi:10.1103/physrevlett.99.036603 pmid:17678305 fatcat:dd3o6qflenawbe7gdgbeuj2x3a