Mesoscopic versus Macroscopic division of current fluctuations

Details Mesoscopic versus Macroscopic division of current fluctuations Mesoscopic versus Macroscopic division of current fluctuations

2005-12-21

arxiv.org/abs/cond-mat/0512534v2

Phys. Rev. Lett. 96, 166806 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.96.166806

We investigate the current shot noise at a three terminal node in which one of the branches contains a noise generating source and the correlations are measured between the currents flowing through the other two branches. Interestingly, if the node is macroscopic, the current correlations are positive, whereas for a quantum coherent mesoscopic node anti-bunching of electrons leads to negative correlations. We present specific predictions which permit the experimental investigation of the crossover from quantum mechanical noise division to macroscopic noise noise division.

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