project title: Full counting statistics using Josephson junction detectors
project leader: Hugues Pothier
access given (in days): 14
access used (in days): 4
local host: Jukka Pekola
home institution: CEA Saclay
country of institution: France
starting date (yyyy-mm-dd): 2006-03-26
The LTL group and the Paris goup (Pothier et al.) are working on experiments on how to detect the shot noise of a mesoscopic conductor beyond the usual second moment, i.e., to determine the so-called full counting statistics (FCS), using Josephson junction threshold detectors. The approaches of the two groups are somewhat different: at LTL detectors with very high resonance frequencies (plasma frequencies) are used, whereas the French group is using low plasma frequency junctions. The aim of this project is to discuss and find jointly optimized detection schemes of FCS using Josephson junctions.
Pothier participated in the ULTI users' meeting in April 2006. We discussed the different measurement strategies, in particular the on-chip design for high-frequency noise. This has been very useful and we have now managed to conduct successful experiments on the third moment of shot noise using a Josephson junction detector [A.V. Timofeev, M. Meschke, J.T. Peltonen, T.T. Heikkilä, and J.P. Pekola, Wide-band detection of the third moment of shot noise by a hysteretic Josephson junction, cond-mat/0612087, accepted to Phys. Rev. Lett].