Noise Correlations in a Coulomb Blockaded Quantum Dot

Details Noise Correlations in a Coulomb Blockaded Quantum Dot Noise Correlations in a Coulomb Blockaded Quantum Dot

2007-03-15

arxiv.org/abs/cond-mat/0703419v1

Phys. Rev. Lett. 99, 036603 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.99.036603

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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