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Sensitive spin detection using differential squids and on chip microwave waveguide

ORAL

Abstract

Sensitive detection of spin resonance is essential for achieving coherent spin qubit control1. Recent experiments have involved bifurcation resonators2, and artificial atoms3, which provide sensitivity over a wide frequency range; however, a broadband device is needed for complex materials2. A novel differential squid detection method for spin systems on a microwave waveguide is being developed at NHMFL. This method utilizes a superconducting niobium coplanar strip line broadband microwave device coupled with niobium nano-squid devices. A nano-fabricated planar Dayem bridge squid is placed inside an omega loop for sensitive spin detection while a secondary squid is placed far away from the omega loop in order to measure background fields. The differential measurement of the fields measured by the two squids will result in a cancellation of background fields with the goal of having a more sensitive spin detection.

1 G. Yue et al., APL 202601 (2017).
2 Budoyo et al., PRM 2.1, 011403 (2018).
3 Toida et al., Comm. Phys. 2.1, 33 (2019).

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Presenters

  • Josiah Cochran

    Department of Physics and National High Magnetic Field Laboratory, Florida State University

Authors

  • Josiah Cochran

    Department of Physics and National High Magnetic Field Laboratory, Florida State University

  • Giovanni Franco-Rivera

    Department of Physics and National High Magnetic Field Laboratory, Florida State University, Department of Physics and The National High Magnetic Field Laboratory, Florida State University

  • Lei Chen

    Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystems and Information Technology, Chinese Academy of Science, Shanghai, China, Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai, China

  • Zhen Wang

    Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystems and Information Technology, Chinese Academy of Science, Shanghai, China, Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai, China

  • Irinel Chiorescu

    Department of Physics and National High Magnetic Field Laboratory, Florida State University, Department of Physics and The National High Magnetic Field Laboratory, Florida State University, Dept of Physics and The National High Magnetic Field Laboratory, Florida State Univ