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Quantum noise in mesoscopic systems
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Wolfgang Belzig
Department of Physics and Astronomy, University of Basel, Klingelbergstr. 82, 4056 Basel, Switzerland |
Full counting statistics aims at a complete characterization of the
distribution of measurement outcomes. In my talk I will demonstrate
how this concept allows to investigate quantum correlations in a variety
of mesoscopic systems. Three examples will be discussed:
a) In analogy to Schottky's work on the current fluctuations in a vacuum
diode, shot noise in superconducting contacts allows to identify the
nature of the elementary charge transfer events.
b) The Coulomb interaction in complex quantum dots or molecules leads
to a strongly correlated current statistics.
c) The density fluctuation statistics in a fermionic quantum gas reflects
the crossover from a superfluid state to a molecular Bose-Einstein condensate. |
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