Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 1: Tutorial: Quantum Shot Noise

TT 1.3: Tutorium

Sonntag, 24. Februar 2008, 16:00–17:00, EW 201

Full counting statistics - a new view on quantum transport — •Wolfgang Belzig — Fachbereich Physik, Universität Konstanz, D-78457 Konstanz

We introduce the concept of Full Counting Statistics (FCS) as new paradigm in the field of quantum transport of electrons. We briefly review some aspects of current fluctuations and the correspondingly investigated current-current correlations in mesoscopic physics: suppression of quantum shot noise due to Fermi statistics, universality of noise in diffusive and chaotic conductors and the influence of induced superconducting correlations. The question we try answer using FCS is, what are the underlying fundamental elementary processes leading to the observed noise properties. While this question might look trivial in simple systems (e.g. independent tunneling of single electrons), the answer in more complicated systems is much more intriguing and by no means obvious. Examples are the transport of entangled electrons, fractional charges in edge states or the transport under the influence of time-dependent fields.