Full text loading...
(a) The noise model of the resonator-SQUID system. The two-stage SQUID is modeled by an ideal current amplifier with the noise sources (back action noise) and (additive noise). (b) Schematic circuit diagram of the resonator-SQUID system. The flux gain between the first and second SQUID is adjusted by means of the superconducting transformer .
SQUID noise spectral density at 11655 Hz as a function of temperature.
SQUID noise spectral density in the frequency range of 10–11 kHz as a function of temperature.
SQUID energy resolution in number of quanta at 11 654 Hz as a function of temperature.
Article metrics loading...