TY - JOUR
T1 - Measurement accuracy of macroscopic quantum circuits with RF-biased Josephson junction arrays
AU - Dunlap, D. H.
AU - Duncan, R. V.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - The DC voltage output from a hysteretic Josephson junction which is locked to an AC frequency source differs from the ideal Josephson relation if the junction drives a current about a closed superconducting circuit. The difference in voltage Delta V from two hysteretic Josephson junctions driven in series opposition is proportional to the difference in their driving frequencies Delta omega if the junctions are each biased to the nth voltage step. It is shown here, however, that Delta V is systematically smaller than the voltage difference Delta V0 predicted by the ideal Josephson relation Delta V0=(nh(cross)/2e) Delta omega . If the loop inductance approaches zero, the smallest detectable voltage difference Delta V0 between two junctions is limited by the intrinsic Josephson inductance. For arrays of more than one junction, however, Delta V0 remains proportional to the loop inductance.
AB - The DC voltage output from a hysteretic Josephson junction which is locked to an AC frequency source differs from the ideal Josephson relation if the junction drives a current about a closed superconducting circuit. The difference in voltage Delta V from two hysteretic Josephson junctions driven in series opposition is proportional to the difference in their driving frequencies Delta omega if the junctions are each biased to the nth voltage step. It is shown here, however, that Delta V is systematically smaller than the voltage difference Delta V0 predicted by the ideal Josephson relation Delta V0=(nh(cross)/2e) Delta omega . If the loop inductance approaches zero, the smallest detectable voltage difference Delta V0 between two junctions is limited by the intrinsic Josephson inductance. For arrays of more than one junction, however, Delta V0 remains proportional to the loop inductance.
UR - http://www.scopus.com/inward/record.url?scp=0042744146&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/4/9/008
DO - 10.1088/0953-2048/4/9/008
M3 - Article
AN - SCOPUS:0042744146
VL - 4
SP - 413
EP - 415
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 9
M1 - 008
ER -