Superconducting Qubits: Study of TLS Defects I

Presentations

• Efficient characterization methods for coherent TLSs with sub-MHz swapping frequencies.

  ORAL

  March 16, 2026, 8:00 AM – March 16, 2026, 8:12 AM

  Presenters

  • Joaquin Minguzzi Aranis

    • AWS Center for Quantum Computing

  Authors

  • Joaquin Minguzzi Aranis

    • AWS Center for Quantum Computing

  • John Owens

    • AWS Center for Quantum Computing

  • Loren Swenson

    • AWS Center for Quantum Computing

  • Matthew Matheny

    • AWS Center for Quantum Computing

  • Oskar Painter

    • AWS Center for Quantum Computing

  View abstract →

• Methods for Describing and Comparing TLS Impacts

  ORAL

  March 16, 2026, 8:12 AM – March 16, 2026, 8:24 AM

  Presenters

  • Rory Cochrane

    • Rigetti Computing

  Authors

  • Rory Cochrane

    • Rigetti Computing

  View abstract →

• Analyzing TLS across Josephson Junction process parameters

  ORAL

  March 16, 2026, 8:24 AM – March 16, 2026, 8:36 AM

  Presenters

  • Cameron J Kopas

    • Rigetti Computing

  Authors

  • Cameron J Kopas

    • Rigetti Computing

  • Rory Cochrane

    • Rigetti Computing

  • Daniel Setiawan

    • Rigetti Computing

  • Nicholas Sharac

    • Rigetti Computing

  • Stefano Poletto

    • Rigetti Computing

  • Hilal Cansizoglu

    • Rigetti Computing

  • Kameshwar Yadavalli

    • Rigetti Computing

  View abstract →

• Accelerated characterization of two-level systems in superconducting qubits via machine learning

  ORAL

  March 16, 2026, 8:36 AM – March 16, 2026, 8:48 AM

  Publication: https://arxiv.org/abs/2509.17723

  Presenters

  • Avinash Pathapati

    • NORDITA

  Authors

  • Avinash Pathapati

    • NORDITA

  • Alexander Conkey Tyner

    • NORDITA

  • Olli Mansikkamaki

    • NORDITA

  • Alexander V Balatsky

    • University of Connecticut
    • Nordita, University of Connecticut

  View abstract →

• DC Noise Measurement on Josephson Junctions

  ORAL

  March 16, 2026, 8:48 AM – March 16, 2026, 9:00 AM

  Presenters

  • Yanpei Deng

    • Northwestern University

  Authors

  • Yanpei Deng

    • Northwestern University

  • Venkat Chandrasekhar

    • Northwestern University

  View abstract →

• Polarizability of a superconducting qubit environment probed by quantum jump correlations

  ORAL

  March 16, 2026, 9:00 AM – March 16, 2026, 9:12 AM

  Presenters

  • Nicolas Gosling

    • Karlsruhe Institute of Technology

  Authors

  • Nicolas Gosling

    • Karlsruhe Institute of Technology

  • Denis Bénâtre

    • Karlsruhe Institute of Technology
    • Karlsruhe Institut of technology

  • Mathieu Féchant

    • Karlsruhe Institute of Technology

  • Martin Spiecker

    • Karlsruhe Institute of Technology

  • Ioan M. Pop

    • Karlsruhe Institute of Technology

  View abstract →

• Broadband Two-Level System Defect Spectroscopy

  ORAL · Invited

  March 16, 2026, 9:12 AM – March 16, 2026, 9:48 AM

  Publication: https://arxiv.org/pdf/2505.18263

  Presenters

  • Mattias V Fitzpatrick

    • Dartmouth

  Authors

  • Mattias V Fitzpatrick

    • Dartmouth

  View abstract →

• Spectroscopy and Coherent Control of Two-Level System Defect Ensembles Using Broadband Cryogenic Transient Dielectric Spectroscopy (BCTDS): Experiments and Results

  ORAL

  March 16, 2026, 9:48 AM – March 16, 2026, 10:00 AM

  Publication: Evidence of Memory Effects in the Dynamics of Two-Level System Defect Ensembles
  Using Broadband, Cryogenic Transient Dielectric Spectroscopy (https://arxiv.org/pdf/2505.18263)

  Presenters

  • Qianxu Wang

    • Dartmouth College

  Authors

  • Qianxu Wang

    • Dartmouth College

  • Juan Salcedo-Gallo

    • Dartmouth College
    • Dartmouth

  • Salil Bedkihal

    • Dartmouth College

  • Tian Xia

    • Dartmouth College

  • Maciej Wojciech Olszewski

    • Cornell University

  • Valla Fatemi

    • Cornell University

  • Mattias V Fitzpatrick

    • Dartmouth

  View abstract →

• Spectroscopy and Coherent Control of Two-Level System Defect Ensembles Using Broadband Cryogenic Transient Dielectric Spectroscopy (BCTDS): Model and Simulations

  ORAL

  March 16, 2026, 10:00 AM – March 16, 2026, 10:12 AM

  Publication: * Evidence of Memory Effects in the Dynamics of Two-Level System Defect Ensembles Using Broadband, Cryogenic Transient Dielectric Spectroscopy, arXiv e-prints , arXiv:2505.18263 (2025).
  * Spectroscopy and Coherent Control of Two-Level System Defect Ensembles Using a Broadband 3D Waveguide, under preparation, 2025

  Presenters

  • Juan Salcedo-Gallo

    • Dartmouth College
    • Dartmouth

  Authors

  • Juan Salcedo-Gallo

    • Dartmouth College
    • Dartmouth

  • Qianxu Wang

    • Dartmouth College

  • Salil Bedkihal

    • Dartmouth College

  • Tian Xia

    • Dartmouth College

  • Maciej Wojciech Olszewski

    • Cornell University

  • Valla Fatemi

    • Cornell University

  • Mattias V Fitzpatrick

    • Dartmouth

  View abstract →

• Experimental observation of short-range magnetic correlations in amorphous Nb₂O₅and Ta₂O₅ thin films.

  ORAL

  March 16, 2026, 10:12 AM – March 16, 2026, 10:24 AM

  Publication: Y.V. Krasnikova et al. arXiv:2505.07957 (2025)

  Presenters

  • Yulia Krasnikova

    • Fermilab, SQMS

  Authors

  • Yulia Krasnikova

    • Fermilab, SQMS

  • Akshay A Murthy

    • Fermi National Accelerator Laboratory (Fermilab)

  • Daniel Bafia

    • Fermi National Accelerator Laboratory (Fermilab)

  • Francesco Crisa

    • Fermi National Accelerator Laboratory
    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory (FNAL)
    • Fermilab

  • Adam C Clairmont

    • Fermilab

  • Zuhawn Sung

    • Fermi National Accelerator Laboratory (FNAL)

  • Jaeyel Lee

    • Fermi National Accelerator Laboratory (FNAL)
    • Fermi National Accelerator Laboratory

  • Maithilee Shinde

    • Illinois Institute of Technology
    • Fermi National Accelerator Laboratory (Fermilab)

  • David van Zanten

    • Fermi National Accelerator Laboratory (Fermilab)

  • Alexander Romanenko

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory, Batavia, Illinois, 60510, USA

  • Mustafa Bal

    • Fermi National Accelerator Laboratory
    • Xanadu

  • Ritika Dhundhwal

    • Karlsruhe Institute of Technology

  • Dirk Fuchs

    • Karlsruhe Institute of Technology

  • Thomas Reisinger

    • Karlsruhe Institute of Technology

  • Ioan M. Pop

    • Karlsruhe Institute of Technology

  • Andreas Suter

    • Paul Scherrer Institute

  • Thomas Prokscha

    • Paul Scherrer Institute

  • Zaher Salman

    • Paul Scherrer Institute

  View abstract →

• Tunneling Spectroscopy Studies of the Magnetic Surface Oxides of Nb: Impact on Qubit Decoherence

  ORAL

  March 16, 2026, 10:24 AM – March 16, 2026, 10:36 AM

  Publication: 1. Electronic Properties of Gold-Capped Niobium Films for Superconducting Qubits
  Junki Makita1, a), Seth Rice1,2 a), Giulia Berti1, Francesco Crisa2,3, Sabrina Garattoni32, Mustafa Ba32, Jaeyel Le3, Zu Hawn Sung3, Akshay A. Murthy3, David Garcia-Wetten4, Dominic P. Goronzy4, Thang Pham4, Vinayak P. Dravid4, Mark C. Hersam4, Michael J. Bedzyk4,5, Jin Su Oh6, Lin Zhou6,7, Alexander Romanenko3, Anna Grassellino3, John Zasadzinski2, Maria Iavarone1,*
  (submitted ACS Nano)
  
  2. Scanning Tunneling Microscopy and Spectroscopy of Nb capped with Re for the Development of Superconducting Qubits
  Seth Rice1,2,3, J. Makita2,3 et al, (Manuscript in Progress)
  
  3.Tunneling study of cavity grade Nb: Possible magnetic scattering at the surface
  Appl. Phys. Lett. 92, 212505 (2008); https://doi.org/10.1063/1.2913764
  T. Proslier, J. F. Zasadzinski, L. Cooley, C. Antoine, J. Moore, J. Norem, M. Pellin, and K. E. Gray

  Presenters

  • John Francis Zasadzinski

    • Illinois Institute of Technology

  Authors

  • John Francis Zasadzinski

    • Illinois Institute of Technology

  • Seth J Rice

    • Illinois Institute of Technology

  • Junki Makita

    • Temple University

  • Ellie Minsuh Han

    • Temple University

  • Sabrina Garattoni

    • Fermilab
    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory (FNAL)
    • Fermi National Accelerator Laboratory

  • Francesco Crisa

    • Fermi National Accelerator Laboratory
    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory (FNAL)
    • Fermilab

  • Mustafa Bal

    • Fermi National Accelerator Laboratory
    • Xanadu

  • Akshay A Murthy

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory, Batavia, Illinois, 60510, USA

  • Maria Iavarone

    • Temple University

  View abstract →

• STS Study on the Increase of Surface Resistance in Superconducting RF Resonators Due To Local Magnetic Impurities in the Surface.

  ORAL

  March 16, 2026, 10:36 AM – March 16, 2026, 10:48 AM

  Presenters

  • Seth J Rice

    • Illinois Institute of Technology

  Authors

  • Seth J Rice

    • Illinois Institute of Technology

  • Junki Makita

    • Temple University

  • Ellie Han

    • Temple University

  • Sabrina Garattoni

    • Fermilab
    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory (FNAL)
    • Fermi National Accelerator Laboratory

  • Francesco Crisa

    • Fermi National Accelerator Laboratory
    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory (FNAL)
    • Fermilab

  • Mustafa Bal

    • Fermi National Accelerator Laboratory (Fermilab)

  • Akshay A Murthy

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

    • Fermi National Accelerator Laboratory (Fermilab)
    • Fermi National Accelerator Laboratory, Batavia, Illinois, 60510, USA

  • Maria Iavarone

    • Temple University

  • John Francis Zasadzinski

    • Illinois Institute of Technology

  View abstract →