title: Measurement of quantum noise in a carbon nanotube quantum dot in the Kondo regime.
abstract: The current emission noise of a carbon nanotube quantum dot in the Kondo regime is measured at frequencies ν of the order or higher than the frequency associated with the Kondo effect k(B)T (K)/h, with TK the Kondo temperature. The carbon nanotube is coupled via an on-chip resonant circuit to a quantum noise detector, a superconductor-insulator-superconductor junction. We find for hν ≈ k(B)T(K) a Kondo effect related singularity at a voltage bias eV ≈ hν, and a strong reduction of this singularity for hν ≈ 3k(B)T(K), in good agreement with theory. Our experiment constitutes a new original tool for the investigation of the nonequilibrium dynamics of many-body phenomena in nanoscale devices.
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, F-91405 Orsay Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Basset
authors.forename: A Yu
authors.initials: AY
authors.lastname: Kasumov
authors.forename: C P
authors.initials: CP
authors.lastname: Moca
authors.forename: G
authors.initials: G
authors.lastname: Zaránd
authors.forename: P
authors.initials: P
authors.lastname: Simon
authors.forename: H
authors.initials: H
authors.lastname: Bouchiat
authors.forename: R
authors.initials: R
authors.lastname: Deblock