Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

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)