An analysis theory of symmetric dc SQUID driven by thermal noises

An analysis expression for the stationary probability distribution of the symmetric superconducting quantum interference device with two Josephson junctions (dc SQUID) driven by thermal noise is derived from two-dimensional Fokker-Planck equations where the potential condition is satisfied. The anal...

Full description

Saved in:
Bibliographic Details
Published in:Superconductor science & technology 2003-04, Vol.16 (4), p.437-443
Main Authors: Jia, Y, Sun, W R, Li, J R
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An analysis expression for the stationary probability distribution of the symmetric superconducting quantum interference device with two Josephson junctions (dc SQUID) driven by thermal noise is derived from two-dimensional Fokker-Planck equations where the potential condition is satisfied. The analytical formulae for SQUID characteristics, e.g. the circulating current, the current-voltage relationship and the transfer function, are obtained by using the probability distribution. The 'ripple' phenomenon of the circulating current versus the applied flux, the effects of thermal fluctuations on current-voltage relationship and the optimum operating condition of dc SQUID system are represented.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/16/4/303