Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Posters Transport
TT 8.50: Poster
Freitag, 4. März 2005, 14:00–18:00, Poster TU C
Full Counting Statistics in a Mach–Zehnder Interferometer — •Heidi Förster1, Sebastian Pilgram2, and Markus Büttiker1 — 1Département de Physique Théorique, Université de Genève — 2Institute of Theoretical Physics, ETH Zürich
We investigate theoretically an electronic Mach–Zehnder interferometer under the influence of dephasing by coupling the interferometer arms to a fluctuating potential [1]. Here we deal with a one–channel quantum coherent transport problem, whereas counting statistics in many channel conductors is to leading order in the channel number independent of dephasing. Using the scattering matrix approach we write down a generating function, that is statistically averaged over the fluctuating potential. We discuss the effect of dephasing on the first three cumulants, and compare with the limiting cases of a fast and a slowly fluctuating potential. In the latter case we show the complete generating function under influence of dephasing.
[1] H. Förster, S. Pilgram, and M. Büttiker (in preparation)