Superconducting Qubits: Study of TLS Defects II

Presentations

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

  Oral-In-person

  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 Wolff

    • University of Illinois at Urbana-Champaign

  • Rahim Raja

  • Shishir Sudhaman

  • Kaushik Singirikonda

    • University of Illinois at Urbana-Champaign

  • Rafael Goncalves

  • Pinshane Huang

    • University of Illinois at Urbana-Champaign

  • Angela Kou

    • University of Illinois at Urbana-Champaign

  • Wolfgang Pfaff

    • University of Illinois at Urbana-Champaign

  View abstract →

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

  Oral-In-person

  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

  • David van Zanten

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

    • Fermi National Accelerator Laboratory (Fermilab)

  • Alexander Romanenko

    • Fermi National Accelerator Laboratory (Fermilab)

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Alec Emser

    • MIT Lincoln Laboratory

  Authors

  • Alec Emser

    • MIT Lincoln Laboratory

  • Jeffrey Gertler

    • MIT Lincoln Laboratory

  • Mallika Randeria

    • MIT Lincoln Laboratory

  • Serra Erdamar

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Michael Gingras

    • MIT Lincoln Laboratory

  • Bethany Niedzielski

  • Hannah Stickler

    • MIT Lincoln Laboratory

  • Mollie Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

• Towards characterizing TLS that impact superconducting qubits

  Invited-In-person · Invited

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

  Presenters

  • Andrew Dane

    • IBM Quantum

  Authors

  • Andrew Dane

    • IBM Quantum

  View abstract →

• Efficient qubit quality factor characterization using broadband SWAP spectroscopy

  Oral-In-person

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

  Presenters

  • Clai Owens

    • Amazon.com, Inc.

  Authors

  • Clai Owens

    • Amazon.com, Inc.

  • Joaquin Minguzzi Aranis

    • AWS Center for Quantum Computing

  • Loren Swenson

  • Ana Valdes

    • University of Maryland College Park

  • Ming-Han Chou

    • AWS Center for Quantum Computing

  • Johnson Qiao

  • Shahriar Aghaeimeibodi

  • Matthew Matheny

    • Amazon.com, Inc.

  • Oskar Painter

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Serra Erdamar

  Authors

  • Serra Erdamar

  • Mallika Randeria

    • MIT Lincoln Laboratory

  • Jeffrey Gertler

    • MIT Lincoln Laboratory

  • Alec Emser

    • MIT Lincoln Laboratory

  • Tristan Brown

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Benjamin Freiman

  • Renée DePencier Piñero

    • MIT Lincoln Laboratory

  • Thomas Hazard

    • MIT Lincoln Laboratory

  • Kate Azar

    • MIT

  • Michael Gingras

    • MIT Lincoln Laboratory

  • Bethany Niedzielski

    • MIT Lincoln Laboratory

  • Hannah Stickler

    • MIT Lincoln Laboratory

  • Mollie Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Mallika Randeria

    • MIT Lincoln Laboratory

  Authors

  • Mallika Randeria

    • MIT Lincoln Laboratory

  • Serra Erdamar

  • Jeffrey Gertler

    • MIT Lincoln Laboratory

  • Alec Emser

    • MIT Lincoln Laboratory

  • Tristan Brown

  • Kunal L. Tiwari

    • MIT Lincoln Laboratory

  • Benjamin Freiman

    • MIT Lincoln Laboratory

  • Renée DePencier Piñero

  • Thomas Hazard

    • MIT Lincoln Laboratory

  • Kate Azar

    • MIT Lincoln Laboratory

  • Michael Gingras

    • MIT Lincoln Laboratory

  • Bethany Niedzielski

  • Hannah Stickler

    • MIT Lincoln Laboratory

  • Mollie Schwartz

    • MIT Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Laboratory

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Ansibert Miruko

    • University of Wisconsin - Madison

  Authors

  • Brooke Becker

  • Ansibert Miruko

    • University of Wisconsin - Madison

  • Priyadarshini Rajkumar

    • University of Wisconsin - Madison

  • Rafael Alapisco

    • University of Wisconsin - Madison

  • Tianshen He

  • Roman Kuzmin

    • University of Wisconsin - Madison

  View abstract →

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

  Oral-In-person

  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 Iaia

    • Lawrence Livermore National Laboratory

  Authors

  • Vito Iaia

    • Lawrence Livermore National Laboratory

  • Emily Joseph

    • University of Wisconsin - Madison

  • Soohyun Im

    • University of Wisconsin - Madison

  • Nicholas Hagopian

  • Sean O'Kelley

  • CE Kim

  • Nicholas Materise

  • Sayan Patra

    • Lawrence Livermore National Laboratory

  • Vincenzo Lordi

    • Lawrence Livermore National Laboratory

  • Mark Eriksson

    • University of Wisconsin - Madison

  • Paul Voyles

  • Keith Ray

    • Lawrence Livermore National Laboratory

  • Yaniv Rosen

    • Lawrence Livermore National Laboratory

  View abstract →

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

  Oral-In-person

  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

    • National Yang Ming Chiao Tung University

  Authors

  • Shouray Kumar Sahu

    • National Yang Ming Chiao Tung University

  • Yen-Hsun Glen Lin

  • Kuan-Hui Lai

    • National Taiwan University

  • Chao-Kai Cheng

    • National Taiwan University

  • Chun-Wei Wu

  • Elica Heredia

  • Ray-Tai Wang

  • Yen-Hsiang Lin

  • Juainai Kwo

  • Minghwei Hong

    • National Taiwan University

  • Juhn-Jong Lin

    • National Yang Ming Chiao Tung University

  • Sheng-Shiuan Yeh

  View abstract →

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

  Oral-In-person

  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

  • Wei-Jie Yan

  • Yen-Hsiang Lin

  • Jueinai Kwo

    • National Tsing Hua University

  • Minghwei Hong

    • National Taiwan University

  View abstract →

• Alternative Junction Oxides for Superconducting Qubits

  Oral-In-person

  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

  • Xanthe Croot

  View abstract →

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

  Oral-In-person

  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

  • Yaniv Rosen

    • Lawrence Livermore National Laboratory

  • Loren Alegria

    • Lawrence Livermore National Laboratory

  View abstract →