Dual on-chip SQUID measurement protocol for flux detection in large magnetic fields

• URL: http://arxiv.org/abs/2012.07559v2
• Date: Mon, 6 Sep 2021 15:06:11 GMT
• Title: Dual on-chip SQUID measurement protocol for flux detection in large magnetic fields
• Authors: Josiah Cochran, Giovanni Franco-Rivera, Denghui Zhang, Lei Chen, Zhen Wang and Irinel Chiorescu
• Abstract summary: We present a novel setup implementing a differential flux measurement using two DC-SQUID magnetometers. The developed protocol uses pulsed readout which minimizes on-chip heating since sub-Kelvin temperatures are needed to preserve quantum spin coherence.
• Score: 9.924659154444736
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Sensitive magnetometers that can operate in high magnetic fields are essential for detecting magnetic resonance signals originating from small ensembles of quantum spins. Such devices have potential applications in quantum technologies, in particular quantum computing. We present a novel experimental setup implementing a differential flux measurement using two DC-SQUID magnetometers. The differential measurement allows for cancellation of background flux signals while enhancing sample signal. The developed protocol uses pulsed readout which minimizes on-chip heating since sub-Kelvin temperatures are needed to preserve quantum spin coherence. Results of a proof of concept experiment are shown as well.

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