Fluctuationdissipation theorem and flux noise in overdamped Josephsonjunction arrays
Abstract
The form of the fluctuationdissipation theorem for a resistively shunted Josephsonjunction array is derived with the help of the method which explicitly takes into account the screening effects. This result is used to express the flux noise power spectrum in terms of the frequencydependent sheet impedance of the array. The relation between the noise amplitude and the parameters of the detection coil is analyzed for the simplest case of a singleloop coil, as well as the frequency dependence of the noise spectrum in different regimes.
 Publication:

Physical Review B
 Pub Date:
 September 2002
 DOI:
 10.1103/PhysRevB.66.104513
 arXiv:
 arXiv:condmat/0203531
 Bibcode:
 2002PhRvB..66j4513K
 Keywords:

 74.40.+k;
 74.80.g;
 74.50.+r;
 Fluctuations;
 Tunneling phenomena;
 point contacts weak links Josephson effects;
 Condensed Matter  Superconductivity
 EPrint:
 ReVTeX, 8 pages