Counting statistics of charge pumping in an open system

Details Counting statistics of charge pumping in an open system Counting statistics of charge pumping in an open system

2001-03-30

arxiv.org/abs/cond-mat/0103617v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 figure

Scientific paper

Electron counting statistics of a current pump in an open system has universal form in the weak pumping current regime. In the time domain, charge transmission is described by two uncorrelated Poisson processes, corresponding to electron transmission in the right and left direction. Overall noise is super-poissonian, and can be reduced to poissonian by tuning the amplitude and phase of driving signal so that current to noise ratio is maximized. Measuring noise in this regime provides a new method for determining charge quantum in an open system without any fitting parameters.

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