Frequency Scales for Current Statistics of Mesoscopic Conductors
arXiv:cond-mat/0306465 · doi:10.1103/PhysRevLett.92.176804
Abstract
We calculate the third cumulant of current in a chaotic cavity with contacts of arbitrary transparency as a function of frequency. Its frequency dependence drastically differs from that of the conventional noise. In addition to a dispersion at the inverse RC time characteristic of charge relaxation, it has a low-frequency dispersion at the inverse dwell time of electrons in the cavity. This effect is suppressed if both contacts have either large or small transparencies.
4 pages
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