Signal and white noise properties of edge junction dc SQUID's

R. T. Wakai, D. J. Van Harlingen

Research output: Contribution to journalArticlepeer-review


We have fabricated and characterized the noise performance of submicron edge junction dc superconducting quantum interference devices (SQUID's) which exhibit excellent signal properties and extremely high flux sensitivity. At frequencies above about 3 MHz, the SQUID noise is white and is in reasonable agreement with computer simulations for a thermal noise-limited detector. In one device the measured flux energy resolution is 1.6±0.5ℏ at 1.5 K, within a factor of 2 of the quantum-limited value suggested by theoretical modeling.

Original languageEnglish (US)
Pages (from-to)1182-1184
Number of pages3
JournalApplied Physics Letters
Issue number14
StatePublished - 1988

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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