Frequency Scales for Current Statistics of Mesoscopic Conductors

Details Frequency Scales for Current Statistics of Mesoscopic Conductors Frequency Scales for Current Statistics of Mesoscopic Conductors

2003-06-18

arxiv.org/abs/cond-mat/0306465v1

Phys. Rev. Lett. 92, 176804 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

10.1103/PhysRevLett.92.176804

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.

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