Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 37: Transport - Fluctuations and Noise

TT 37.3: Vortrag

Mittwoch, 9. März 2005, 10:45–11:00, TU H3027

Super-Poissonian Noise in Complex Quantum Dots — •Wolfgang Belzig — Department of Physics and Astronomy, University of Basel, Klingelbergstr. 82, 4056 Basel, Schweiz

We examine the full counting statistics of quantum dots, which display super-Poissonian zero-frequency shot noise. By an extension to a generic situation with many excited states we identify the underlying transport process. The statistics allows to clearly identify the bunching-processes which leads to the enahnced noise. The obtained results could be useful to determine transport characteristics in molecules and large quantum dots, since the noise (an higher cumulants) allow to identify the internal level structure, which does not show up in the average current.