Developing Monolithic Superconducting Resonators for Gate-Based Quantum Dot Readout

ORAL

Abstract

Gate-based sensing using resonant circuitry has been identified as a promising path towards high fidelity, fast, and compact readout for semiconductor quantum computing architectures. By coupling a quantum dot (QD) system to an LC resonator, the state is inferred via the reflected phase response. The resistive loss in the discrete inductors and loss associated with wirebonds often limit measurement sensitivity. In contrast to oft used surface mount components, we have fabricated Nb superconducting resonators to reduce resistive loss and will explore additional high kinetic inductance materials. The resonators are intended for monolithic integration with QD gates to reduce resonator-gate loss. We present transmission and reflection data used to assess our ability to deterministically fabricate resonators with designed inductance and capacitance values. Efforts to optimize resonance quality factor and integrate resonators with QDs are discussed.

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Presenters

  • Zac Barcikowski

    • University of Maryland, College Park

Authors

  • Zac Barcikowski

    • University of Maryland, College Park

  • Michael David Stewart

    • National Institutue of Standards and Technology
    • National Institute of Standards and Technology

  • Mustafa Bal

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • National Institute of Standard and Technology Boulder
    • National Institute of Standards and Technology - Boulder

  • Christopher Richardson

    • Laboratory for Physical Sciences
    • Laboratory of Physical Sciences
    • Laboratory of Physical Sciences, University of Maryland, College Park

  • David Pappas

    • NIST Boulder
    • National Institute of Standards and Technology Boulder
    • NIST
    • National Institute of Standards and Technology
    • National Institute of Standard and Technology Boulder
    • National Institute of Standards and Technology - Boulder

  • Joshua Pomeroy

    • National Institutue of Standards and Technology
    • National Institute of Standards and Technology