title: Current noise in ac-driven nanoscale conductors.
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.
authors.affiliation: Institut für Physik, Universität Augsburg, Universitätsstrasse 1, D-86135 Augsburg, Germany.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Camalet
authors.forename: Jörg
authors.initials: J
authors.lastname: Lehmann
authors.forename: Sigmund
authors.initials: S
authors.lastname: Kohler
authors.forename: Peter
authors.initials: P
authors.lastname: Hänggi