First results of 2D superconducting quantum device coherence fabricated via innovative materials, substrate and passivation techniques

POSTER

Abstract

The past two decades has witnessed incredible enhancement of coherence time in superconducting quantum devices (SQDs). Much of this progress has been accomplished by optimization of device design and geometry. It has become clear that addressing the quality of superconducting films and interfaces in planar SQDs is of utmost importance to further improve coherence times beyond millisecond timescale. In this contribution we report the first results of superconducting transmission line resonators and transmon qubit devices fabricated at the SQMS Center (at the Pritzker nanofabrication facility at University of Chicago). A systematic investigation based on materials findings is pursued which addresses TLS losses introduced by amorphous interfaces and other new loss mechanisms which have been found recently with SQMS materials investigations [1-3] This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Superconducting Quantum Materials and Systems Center (SQMS) under contract number DE-AC02-07CH11359.

[1] Akshay A. Murthy et al, arXiv:2108.13539

[2] Mattia Checchin et al, arXiv:2108.08894

[3] Jaeyel Lee et al, arXiv:2108.10385

Publication: [1] Akshay A. Murthy et al, arXiv:2108.13539
[2] Mattia Checchin et al, arXiv:2108.08894
[3] Jaeyel Lee et al, arXiv:2108.10385

Presenters

  • Mustafa Bal

    • National Institute of Standards and Technology Boulder
    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

Authors

  • Mustafa Bal

    • National Institute of Standards and Technology Boulder
    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Arpita Mitra

    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Shaojiang Zhu

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Mattia Checchin

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Akshay A Murthy

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • ZuHawn Sung

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Jaeyel Lee

    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • Fermilab

  • Daniel Bafia

    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • Fermi National Accelerator Laboratory

  • David Van Zanten

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Grigory Eremeev

    • Fermi National Accelerator Laboratory
    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Francesco Crisa

    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Ivan Nekrashevich

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA Department of Integrated Bio & Nano Systems, University of Houston, Houston, TX 77204, USA
    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • Los Alamos Natl Lab

  • Daniil Frolov

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • Superconducting Quantum Materials and Systems, Fermi National Accelerator Laboratory

  • Roman Pilipenko

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • FNAL
    • Superconducting Quantum Materials and Systems, Fermi National Accelerator Laboratory

  • Alexander Romanenko

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab

  • Anna Grassellino

    • Fermilab
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab