Abstract

We present the design of an integrated planar SQUID device in view of macroscopic quantum coherence (MQC) experiments. This device is made up by an rf SQUID, as a probe to test the MQC, and a readout system based on a dc SQUID sensor coupled to the probe. To minimize the electromagnetic noise from environment, gradiometric configuration of rf SQUID, dc SQUID and a flux transformer is included. Preliminary results on the decay from the metastable flux state for different rf SQUID-based devices in the classical limit are shown.

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