Condensed Matter Theory   Universität Basel
Dr. Jörg Lehmann

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

S. Kohler, S. Camalet, M. Strass, J. Lehmann, G.-L. Ingold und P. Hänggi

Chem. Phys. 296, 243 (2004)

Preprint: arXiv:cond-mat/0306704

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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