title: Asymmetric noise probed with a josephson junction.
abstract: Fluctuations of the current through a tunnel junction are measured using a Josephson junction. The current noise adds to the bias current of the Josephson junction and affects its switching out of the supercurrent branch. The experiment is carried out in a regime where switching is determined by thermal activation. The variance of the noise results in an elevated effective temperature, whereas the third cumulant, related to its asymmetric character, leads to a difference in the switching rates observed for opposite signs of the current through the tunnel junction. Measurements are compared quantitatively with recent theoretical predictions.
authors.affiliation: Quantronics group, Service de Physique de l'Etat Condensé (CNRS URA 2464), CEA-Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: Q
authors.initials: Q
authors.lastname: Le Masne
authors.forename: H
authors.initials: H
authors.lastname: Pothier
authors.forename: Norman O
authors.initials: NO
authors.lastname: Birge
authors.forename: C
authors.initials: C
authors.lastname: Urbina
authors.forename: D
authors.initials: D
authors.lastname: Esteve