Current Noise in ac-Driven Nanoscale Conductors

Sébastien Camalet, Jörg Lehmann, Sigmund Kohler, and Peter Hänggi
Phys. Rev. Lett. 90, 210602 – Published 29 May 2003

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.

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  • Received 11 December 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.210602

©2003 American Physical Society

Authors & Affiliations

Sébastien Camalet, Jörg Lehmann, Sigmund Kohler, and Peter Hänggi

  • Institut für Physik, Universität Augsburg, Universitätsstraße 1, D-86135 Augsburg, Germany

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Issue

Vol. 90, Iss. 21 — 30 May 2003

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