Charge transport through a molecule driven by a high-frequency field

  • We study the current and the associated noise for the transport through a two-site molecule driven by an external oscillating field. Within a high-frequency approximation, the time-dependent Hamiltonian is mapped to a static one with effective parameters that depend on the driving amplitude and frequency. This analysis allows an intuitive physical picture explaining the nontrivial structure found in the noise properties as a function of the driving amplitude. The presence of dips in the Fano factor permits a control of the noise level by means of an appropriate external driving.

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Author:Sigmund KohlerORCiDGND, Sébastien Camalet, Michael StrassGND, Jörg LehmannGND, Gert-Ludwig IngoldORCiDGND, Peter HänggiORCiDGND
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Publishing Institution:Universität Augsburg
Release Date:2006/09/08
Tag:quantum transport; driven systems; noise
GND-Keyword:Rauschen; Transportprozess; Hochfrequenz; Molekül; Feld <Physik>
Source:erschienen in: Chemical Physics 296, 243–249 (2004); DOI: 10.1016/j.chemphys.2003.09.023; URL:
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik