Current Noise in ac-Driven Nanoscale Conductors
Mesoscale and Nanoscale Physics
2009-11-07 v1
Abstract
The theory for current fluctuations in ac-driven transport through nanoscale systems is put forward. By use of a generalized, non-Hermitian Floquet theory we derive novel explicit expressions for the time-averaged current and the zero-frequency component of the power spectrum of current fluctuations. A distinct suppression of both the zero-frequency noise and the dc-current occurs for suitably tailored ac-fields. The relative level of transport noise, being characterized by a Fano factor, can selectively be manipulated by ac-sources; in particular, it exhibits both characteristic maxima and minima near current suppression.
Keywords
Cite
@article{arxiv.cond-mat/0212247,
title = {Current Noise in ac-Driven Nanoscale Conductors},
author = {Sébastien Camalet and Jörg Lehmann and Sigmund Kohler and Peter Hänggi},
journal= {arXiv preprint arXiv:cond-mat/0212247},
year = {2009}
}
Comments
4 pages, 2 figures