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Holey Interferometer Structures Which Are Less Susceptible To Trapped Flux

IP.com Disclosure Number: IPCOM000053518D
Original Publication Date: 1980-Jan-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Chang, WH [+details]

Abstract

The Holey Interferometer is ideal for use as a logic element because it is smaller than other known Josephson interferometer structures. However, the Holey Interferometer is much more susceptible to flux which is trapped in its associated ground plane. To eliminate trappped flux, the ambient field must be controlled to be negligible (almost field free). The shielding necessary to obtain such a small field is very difficult to obtain, if at all possible. Another approach is to construct an interferometer device such that the device characteristics are insensitive to trapped flux. Still another approach is to construct devices which are less sensitive to trapped flux while at the same time providing a low ambient field environment in which such devices operate.