Design and Characterization of Superconducting Quasiparticle-Amplifying Transmons

ORAL

Abstract

The superconducting quasiparticle-amplifying transmon (SQUAT) is a qubit-based sensor for THz photons and meV-scale phonons, and will be deployed as the primary sensor in a number of upcoming low-mass dark matter and neutrino scattering applications. Events create quasiparticles which tunnel across the transmon's junction, flipping its parity state, and are detected by monitoring the parity switching rate via the SQUAT's rf transmission. The SQUAT is inherently multiplexable and has the potential for excellent energy resolution, bandwidth, and noise performance. Here, we present on the design and measured characteristics of the current SQUAT devices, and discuss devices fabricated with hafnium junctions which allow for greater quasiparticle trapping.

*This work was supported in part by the US Department of Energy Early Career Research Program (ECRP) under FWP 100872. This work was supported in part by the DOE Office of Science High Energy Physics QuantISED program. This work was supported in part by a Graduate Research Instrumentation Award (GIRA) through the Coordination Panel for Advanced Detectors (CPAD) as funded by the DOE Office of High Energy Physics.

–

Publication: A First Demonstration of the SQUAT Detector Architecture: Direct Measurement of Resonator-Free Charge-Sensitive Transmon (planned)

Presenters

  • Taj A Dyson

    • Stanford University
    • Stanford University / SLAC National Accelerator Laboratory

Authors

  • Taj A Dyson

    • Stanford University
    • Stanford University / SLAC National Accelerator Laboratory

  • Noah Alexander Kurinsky

    • Stanford University / SLAC National Accelerator Laboratory
    • SLAC National Accelerator Laboratory

  • Chiara P Salemi

    • Stanford University
    • UC Berkeley/LBNL

  • Hannah W Magoon

    • Stanford University
    • Stanford University / SLAC National Accelerator Laboratory

  • Taylor Aralis

    • SLAC National Accelerator Laboratory

  • Grace Bratrud

    • Northwestern University

  • Samuel S Condon

    • Stanford University

  • Jadyn Anczarski

    • Villanova University

  • Caleb Wade Fink

    • Los Alamos National Laboratory (LANL)

  • Shannon P Harvey

    • Stanford University / SLAC National Accelerator Laboratory
    • Stanford University

  • Aviv Simchony

    • Stanford university

  • Zoë J Smith

    • Stanford university

  • Noshin Tabassum

    • SLAC National Accelerator Laboratory
    • Yale University

  • Betty Young

    • Santa Clara University

  • David I Schuster

    • Stanford University / SLAC National Accelerator Laboratory
    • University of Chicago
    • Stanford

  • David I Schuster

    • Stanford University / SLAC National Accelerator Laboratory
    • University of Chicago
    • Stanford