title: Interaction-induced harmonic frequency mixing in quantum dots.
abstract: We show that harmonic frequency mixing in quantum dots coupled to two leads under the influence of time-dependent voltages of different frequency is dominated by interaction effects. This offers a unique and direct spectroscopic tool to access correlations, and holds promise for efficient frequency mixing in nanodevices. Explicit results are provided for an Anderson dot and for a molecular level with phonon-mediated interactions.
authors.affiliation: Institut für Theoretische Physik, Heinrich-Heine-Universität at Düsseldorf, D-40225 Düsseldorf, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Thorwart
authors.forename: R
authors.initials: R
authors.lastname: Egger
authors.forename: A O
authors.initials: AO
authors.lastname: Gogolin