Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Wakai et al. (1988) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: