title: Manifestly non-Gaussian fluctuations in superconductor-normal metal tunnel nanostructures.
abstract: We propose a mesoscopic setup which exhibits strong and manifestly non-Gaussian fluctuations of energy and temperature when suitably driven out of equilibrium. The setup consists of a normal metal island (N) coupled by tunnel junctions (I) to two superconducting leads (S), forming a SINIS structure, and is biased near the threshold voltage for quasiparticle tunneling, eV≈2Δ. The fluctuations can be measured by monitoring the time-dependent electric current through the system. This makes the setup suitable for the realization of feedback schemes which can be used to stabilize the temperature to the desired value.
authors.affiliation: Low Temperature Laboratory, Aalto University, Aalto, Finland. matti.laakso@aalto.fi
authors.forename: M A
authors.initials: MA
authors.lastname: Laakso
authors.forename: T T
authors.initials: TT
authors.lastname: Heikkilä
authors.forename: Yuli V
authors.initials: YV
authors.lastname: Nazarov