Detecting Current Noise with a Josephson Junction in the Macroscopic Quantum Tunneling Regime
Mesoscale and Nanoscale Physics
2010-03-29 v1 Superconductivity
Abstract
We discuss the use of a hysteretic Josephson junction to detect current fluctuations with frequencies below the plasma frequency of the junction. These adiabatic fluctuations are probed by switching measurements observing the noise-affected average rate of macroscopic quantum tunneling of the detector junction out of its zero-voltage state. In a proposed experimental scheme, frequencies of the noise are limited by an on-chip filtering circuit. The third cumulant of current fluctuations at the detector is related to an asymmetry of the switching rates.
Keywords
Cite
@article{arxiv.cond-mat/0611593,
title = {Detecting Current Noise with a Josephson Junction in the Macroscopic Quantum Tunneling Regime},
author = {J. T. Peltonen and A. V. Timofeev and M. Meschke and J. P. Pekola},
journal= {arXiv preprint arXiv:cond-mat/0611593},
year = {2010}
}
Comments
26 pages, 10 figures. To appear in Journal of Low Temperature Physics in the proceedings of the ULTI conference organized in Lammi, Finland (2006)