Small Josephson junction as detector of non-Gaussian noise

Rene K. Lindell, Mika A. Sillanpää, Tero T. Heikkilä, Julien Delahaye, Takahide Yamaguchi, Edouard B. Sonin, Pertti J. Hakonen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The current in a a Coulomb blockaded Josephson junction is sensitive to voltage or phase fluctuations in its electromagnetical environment. This property can be used to detect noise also from non-Gaussian noise sources. We have experimentally studied IV-curves of as a function of the shot noise current in a nearby tunnel junction. We observe a linear enhancement of zero-bias conductance of the Josephson junction as a function of the shot noise power. Furthermore, with increasing shot noise power, the IV-curves becomes asymmetric with a shift of minimum conductance and the appearance of a local conductance maximum. A quantitative explanation for the asymmetric features due to the non-Gaussian noise sources is still an open question. There is also motivation to pursue modifications of the current scheme in order to detect individual statistical moments of noise and to connect different noise sources to the Josephson junction.

Original languageEnglish
Title of host publicationUNSOLVED PROBLEMS OF NOISE AND FLUCTUATIONS
Subtitle of host publicationUPoN 2005: Fourth International Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology, and High Technology
Pages563-568
Number of pages6
DOIs
Publication statusPublished - 14 Nov 2005
Externally publishedYes
EventUPoN 2005: 4th International Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology and High Technology - Gallipoli, Lecce, Italy
Duration: 6 Jun 200510 Jun 2005

Publication series

NameAIP Conference Proceedings
Volume800
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceUPoN 2005: 4th International Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology and High Technology
Country/TerritoryItaly
CityGallipoli, Lecce
Period6/06/0510/06/05

Keywords

  • Josephson junction
  • Non-Gaussian
  • Shot noise

ASJC Scopus subject areas

  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Small Josephson junction as detector of non-Gaussian noise'. Together they form a unique fingerprint.

Cite this