Superconducting Qubits: Study of TLS Defects II

Presentations

• Correlating reductions in TLS density in Josephson junctions with fabrication methods and microstructure

  ORAL

  March 17, 2026, 12:00 PM – March 17, 2026, 12:12 PM

  Presenters

  • Harshvardhan Mantry

    • University of Illinois at Urbana-Champaign

  Authors

  • Harshvardhan Mantry

    • University of Illinois at Urbana-Champaign

  • Oliver F Wolff

    • University of Illinois at Urbana-Champaign

  • Rahim Raja

    • University of Illinois at Urbana-Champaign

  • Shishir Sudhaman

    • University of Illinois at Urbana-Champaign

  • Kaushik Singirikonda

    • University of Illinois at Urbana-Champaign

  • Rafael S Goncalves

    • University of Illinois at Urbana-Champaign

  • Pinshane Y Huang

    • University of Illinois at Urbana-Champaign

  • Angela Kou

    • University of Illinois at Urbana-Champaign
    • University of Illinois Urbana-Champaign

  • Wolfgang Pfaff

    • University of Illinois at Urbana-Champaign

  View abstract →

• TLS characterization using multilevel decay of a fixed-frequency transmon

  ORAL

  March 17, 2026, 12:12 PM – March 17, 2026, 12:24 PM

  Presenters

  • Tanay Roy

    • Fermi National Accelerator Laboratory (Fermilab)

  Authors

  • Tanay Roy

    • Fermi National Accelerator Laboratory (Fermilab)

  • Xinyuan You

    • Fermi National Accelerator Laboratory (Fermilab)

  • Mustafa Bal

    • Fermi National Accelerator Laboratory
    • Xanadu

  • David van Zanten

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

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

  • Alexander Romanenko

    • Fermi National Accelerator Laboratory (Fermilab)

  View abstract →

• Accelerated characterization of superconducting qubit relaxation times through modulated AC-Stark shifts 

  ORAL

  March 17, 2026, 12:24 PM – March 17, 2026, 12:36 PM

  Presenters

  • Alec L Emser

    • MIT Lincoln Laboratory

  Authors

  • Alec L Emser

    • MIT Lincoln Laboratory

  • Jeffrey M Gertler

    • MIT Lincoln Laboratory

  • Mallika T Randeria

    • MIT Lincoln Laboratory

  • Serra Erdamar

    • MIT Lincoln Laboratory

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Michael A Gingras

    • MIT Lincoln Laboratory

  • Bethany M Niedzielski

    • MIT Lincoln Laboratory

  • Hannah M Stickler

    • MIT Lincoln Laboratory

  • Mollie E. Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

• Towards characterizing TLS that impact superconducting qubits

  ORAL · Invited

  March 17, 2026, 12:36 PM – March 17, 2026, 1:12 PM

  Presenters

  • Andrew Edward Dane

    • IBM Quantum

  Authors

  • Andrew Edward Dane

    • IBM Quantum

  View abstract →

• Efficient qubit quality factor characterization using broadband SWAP spectroscopy

  ORAL

  March 17, 2026, 1:12 PM – March 17, 2026, 1:24 PM

  Presenters

  • Clai Owens

    • AWS Center for Quantum Computing

  Authors

  • Clai Owens

    • AWS Center for Quantum Computing

  • Joaquin Minguzzi Aranis

    • AWS Center for Quantum Computing

  • Loren Swenson

    • AWS Center for Quantum Computing

  • Ana Valdes

    • AWS Center for Quantum Computing

  • Ming-Han Chou

    • AWS Center for Quantum Computing

  • Johnson Qiao

    • AWS Center for Quantum Computing

  • Shahriar Aghaeimeibodi

    • AWS Center for Quantum Computing

  • Matthew Matheny

    • AWS Center for Quantum Computing

  • Oskar Painter

    • AWS Center for Quantum Computing

  View abstract →

• Spectroscopy of two-level system defects in fluxonium: Part 1

  ORAL

  March 17, 2026, 1:24 PM – March 17, 2026, 1:36 PM

  Presenters

  • Serra Erdamar

    • MIT Lincoln Laboratory

  Authors

  • Serra Erdamar

    • MIT Lincoln Laboratory

  • Mallika T Randeria

    • MIT Lincoln Laboratory

  • Jeffrey M Gertler

    • MIT Lincoln Laboratory

  • Alec L Emser

    • MIT Lincoln Laboratory

  • Tristan Brown

    • MIT Lincoln Laboratory

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Benjamin R Freiman

    • MIT Lincoln Laboratory

  • Renée D DePencier Piñero

    • MIT Lincoln Laboratory

  • Thomas M Hazard

    • MIT Lincoln Laboratory

  • Kate Azar

    • MIT

  • Michael A Gingras

    • MIT Lincoln Laboratory

  • Bethany M Niedzielski

    • MIT Lincoln Laboratory

  • Hannah M Stickler

    • MIT Lincoln Laboratory

  • Mollie E. Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

• Spectroscopy of two-level system defects in fluxonium: Part 2 

  ORAL

  March 17, 2026, 1:36 PM – March 17, 2026, 1:48 PM

  Presenters

  • Mallika T Randeria

    • MIT Lincoln Laboratory

  Authors

  • Mallika T Randeria

    • MIT Lincoln Laboratory

  • Serra Erdamar

    • MIT Lincoln Laboratory

  • Jeffrey M Gertler

    • MIT Lincoln Laboratory

  • Alec L Emser

    • MIT Lincoln Laboratory

  • Tristan Brown

    • MIT Lincoln Laboratory

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Benjamin Robert Freiman

    • MIT Lincoln Laboratory

  • Renée DePencier Piñero

    • MIT Lincoln Laboratory

  • Thomas M Hazard

    • MIT Lincoln Laboratory

  • Kate Azar

    • MIT Lincoln Laboratory

  • Michael A Gingras

    • MIT Lincoln Laboratory

  • Bethany M Niedzielski

    • MIT Lincoln Laboratory

  • Hannah M Stickler

    • MIT Lincoln Laboratory

  • Mollie E. Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

• Dielectric Loss and TLS in Josephson Junction Arrays and Fluxonium Qubits

  ORAL

  March 17, 2026, 1:48 PM – March 17, 2026, 2:00 PM

  Presenters

  • Ansibert S Miruko

    • University of Wisconsin - Madison
    • University of Wisconsin-Madison

  Authors

  • Brooke M Becker

    • University of Wisconsin - Madison
    • University of Wisconsin-Madison

  • Ansibert S Miruko

    • University of Wisconsin - Madison
    • University of Wisconsin-Madison

  • Priyadarshini Rajkumar

    • University of Wisconsin - Madison
    • University of Wisconsin-Madison

  • Rafael Alapisco

    • University of Wisconsin - Madison

  • Tianshen He

    • University of Wisconsin - Madison
    • University of Wisconsin-Madison

  • Roman V Kuzmin

    • University of Wisconsin - Madison

  View abstract →

• Non-equilibrium Dynamics of Two-level Systems directly after Cryogenic Alternating Bias

  ORAL

  March 17, 2026, 2:00 PM – March 17, 2026, 2:12 PM

  Publication: Iaia, V., E. S. Joseph, S. Im, N. Hagopian, S. O'Kelley, C. Kim, N. Materise, S. Patra, V. Lordi, M. A. Eriksson, P. M. Voyles, K. G. Ray, and Y. J. Rosen, "Non-equilibrium Dynamics of Two-level Systems directly after Cryogenic Alternating Bias." arXiv preprint arXiv:2509.19223 (2025).

  Presenters

  • Vito M Iaia

    • Lawrence Livermore National Laboratory

  Authors

  • Vito M Iaia

    • Lawrence Livermore National Laboratory

  • Emily S Joseph

    • University of Wisconsin - Madison

  • Soohyun Im

    • University of Wisconsin - Madison

  • Nicholas L Hagopian

    • University of Wisconsin Madison
    • University of Wisconsin - Madison

  • Sean R O'Kelley

    • Lawrence Livermore National Laboratory

  • CE Kim

    • Lawrence Livermore National Laboratory

  • Nicholas Materise

    • Lawrence Livermore National Laboratory

  • Sayan Patra

    • Lawrence Livermore National Laboratory

  • Vincenzo Lordi

    • Lawrence Livermore National Laboratory

  • Mark A Eriksson

    • University of Wisconsin-Madison
    • University of Wisconsin - Madison

  • Paul Voyles

    • University of Wisconsin-Madison
    • University of Wisconsin Madison
    • University of Wisconsin - Madison

  • Keith G Ray

    • Lawrence Livermore National Laboratory

  • Yaniv J Rosen

    • Lawrence Livermore National Laboratory

  View abstract →

• 1/f noise and two-level systems in MBE-grown Al thin films

  ORAL

  March 17, 2026, 2:12 PM – March 17, 2026, 2:24 PM

  Publication: 1) Shouray Kumar Sahu et al., "1/f noise and two-level systems in MBE-grown Al thin films," APL Mater. 13, 071120 (2025)

  Presenters

  • Shouray Kumar Sahu

    • International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010

  Authors

  • Shouray Kumar Sahu

    • International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010

  • Yen-Hsun Glen Lin

    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  • Kuan-Hui Lai

    • National Taiwan University
    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  • Chao-Kai Cheng

    • National Taiwan University
    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  • Chun-Wei Wu

    • Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010

  • Elica A Heredia

    • International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010

  • Ray-Tai Wang

    • Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010

  • Yen-Hsiang Lin

    • National Tsing Hua University
    • Department of Physics, National Tsing Hua University, Hsinchu 300044

  • Juainai Kwo

    • National Tsing Hua University
    • National TsingHua University
    • Department of Physics, National Tsing Hua University, Hsinchu 300044

  • Minghwei Hong

    • National Taiwan University
    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  • Juhn-Jong Lin

    • Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010

  • Sheng-Shiuan Yeh

    • National Yang Ming Chiao Tung University
    • International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010

  View abstract →

• Structure, transport, and microwave properties of superconducting tantalum films with in situ deposited oxides

  ORAL

  March 17, 2026, 2:24 PM – March 17, 2026, 2:36 PM

  Presenters

  • Yi-Ting Cheng

    • National Taiwan University

  Authors

  • Yi-Ting Cheng

    • National Taiwan University

  • Hsien-Wen Wan

    • National Taiwan University

  • Lawrence Boyu Young

    • National Taiwan University

  • Chao-Kai Cheng

    • National Taiwan University
    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  • Wei-Jie Yan

    • National Tsing Hua University

  • Yen-Hsiang Lin

    • National Tsing Hua University
    • Department of Physics, National Tsing Hua University, Hsinchu 300044

  • Juainai Kwo

    • National Tsing Hua University
    • National TsingHua University
    • Department of Physics, National Tsing Hua University, Hsinchu 300044

  • Minghwei Hong

    • National Taiwan University
    • Graduate Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei 106319

  View abstract →

• Alternative Junction Oxides for Superconducting Qubits

  ORAL

  March 17, 2026, 2:36 PM – March 17, 2026, 2:48 PM

  Presenters

  • Yun Li

    • University of Sydney

  Authors

  • Yun Li

    • University of Sydney

  • Dan Osgood

    • University of Sydney

  • Alex Ryan

    • The University of Sydney

  • Xanthe Croot

    • The University of Sydney
    • University of Sydney

  View abstract →

• Josephson junction metal encapsulation and its effect on junction and superconducting qubit performance

  ORAL

  March 17, 2026, 2:48 PM – March 17, 2026, 3:00 PM

  Presenters

  • Bevin Huang

    • Lawrence Livermore National Lab

  Authors

  • Bevin Huang

    • Lawrence Livermore National Lab

  • Alex Abelson

    • Lawrence Livermore National Laboratory

  • Kevin Chaves

    • Lawrence Livermore National Laboratory

  • Lyrik Lee

    • Lawrence Livermore National Laboratory

  • Yaniv J Rosen

    • Lawrence Livermore National Laboratory

  • Loren D Alegria

    • Lawrence Livermore National Laboratory

  View abstract →