Measuring non-gaussian fluctuations through incoherent cooper-pAir current

Tero T. Heikkilä*, Pauli Virtanen, Göran Johansson, Frank K. Wilhelm

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


An on-chip detector of voltage fluctuations based on capacitively coupling a noise source to a small Josephson junction (JJ) in Coulomb-blockade was analyzed. The current-voltage characteristics of the JJ were found to be sensitive to the excess voltage fluctuations in the source. It was observed that via the symmetry of the detector output current, the contributions from the second and third cumulants could be identified. It was concluded that after calibration, one can measure the Fano factors for the noise source and get information about the frequency dependence of the noise.

Original languageEnglish
Article number247005
JournalPhysical Review Letters
Issue number24
StatePublished - 10 Dec 2004
Externally publishedYes


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