Highly precise comparison of Nb/Al/AlO sub(x)/Al/AlO sub(x)/Al/Nb Josephson junction arrays using a SQUID as a null detector

Highly precise comparison of Nb/Al/AlO sub(x)/Al/AlO sub(x)/Al/Nb Josephson junction arrays using a SQUID as a null detector

A direct comparison of two voltages at 0.6 V reproduced by programmable arrays with Nb/Al/AlO sub(x)/Al/AlO sub(x)/Al/Nb Josephson junctions was carried out using a SQUID as a null detector. The voltage difference was measured and found to be smaller than 1.2 x 10 super(-17) V. Jumps of the current...

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Veröffentlicht in:Superconductor science & technology 2002-07, Vol.15 (7), p.1034-1036
Hauptverfasser: Krasnopolin, I Y, Behr, R, Niemeyer, J
Format: Artikel
Sprache:eng
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Zusammenfassung:A direct comparison of two voltages at 0.6 V reproduced by programmable arrays with Nb/Al/AlO sub(x)/Al/AlO sub(x)/Al/Nb Josephson junctions was carried out using a SQUID as a null detector. The voltage difference was measured and found to be smaller than 1.2 x 10 super(-17) V. Jumps of the current in the flux transformer loop can be attributed to phase-slipping events when the phase lock in the arrays is broken.
ISSN:0953-2048