New Capacitors, Josephson Junctions, and Mergemons

Presentations

• Design and fabrication of a merged element transmon with a phononic bandgap shield – Part 1

  ORAL

  March 17, 2026, 3:30 PM – March 17, 2026, 3:42 PM

  Presenters

  • Olivia Pitcl

    • Caltech

  Authors

  • Olivia Pitcl

    • Caltech

  • Gihwan Kim

    • Caltech

  • Matt Davidson

    • Caltech

  • Christopher Freestone

    • Caltech

  • Shuhul Mujoo

    • Caltech

  • Benjamin Boone

    • Caltech

  • Sara Magdalena Gomez

    • Caltech

  • Oskar Painter

    • Caltech
    • Caltech, Amazon Web Services

  View abstract →

• Design and fabrication of a merged element transmon with a phononic bandgap shield – Part 2

  ORAL

  March 17, 2026, 3:42 PM – March 17, 2026, 3:54 PM

  Presenters

  • Christopher Freestone

    • Caltech

  Authors

  • Christopher Freestone

    • Caltech

  • Olivia Pitcl

    • Caltech

  • Matt Davidson

    • Caltech

  • Gihwan Kim

    • Caltech

  • Benjamin Boone

    • Caltech

  • Shuhul Mujoo

    • Caltech

  • Sara Magdalena Gomez

    • Caltech

  • Oskar Painter

    • Caltech
    • Caltech, Amazon Web Services

  View abstract →

• A phonon-engineered merged-element transmon qubit: Part I

  ORAL

  March 17, 2026, 3:54 PM – March 17, 2026, 4:06 PM

  Presenters

  • Kangdi Yu

    • University of California, Berkeley

  Authors

  • Kangdi Yu

    • University of California, Berkeley

  • Leo V Sementilli

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Zi-Huai Zhang

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory
    • Princeton University

  • Nikitha Chalgeri

    • University of California, Berkeley

  • Haoxin Zhou

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Alp Sipahigil

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  View abstract →

• A phonon-engineered merged-element transmon qubit: Part II

  ORAL

  March 17, 2026, 4:06 PM – March 17, 2026, 4:18 PM

  Presenters

  • Leo V Sementilli

    • University of California, Berkeley

  Authors

  • Leo V Sementilli

    • University of California, Berkeley

  • Kangdi Yu

    • University of California, Berkeley

  • Zi-Huai Zhang

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory
    • Princeton University

  • Nikitha Chalgeri

    • University of California, Berkeley

  • Haoxin Zhou

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Alp Sipahigil

    • University of California, Berkeley
    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  View abstract →

• Group IV Fully Crystalline Josephson Junctions for Scalable Superconducting Qubits

  ORAL

  March 17, 2026, 4:18 PM – March 17, 2026, 4:30 PM

  Presenters

  • Frederick Knudsen

    • New York University (NYU)
    • NYU

  Authors

  • Axel Leblanc

    • New York University (NYU)

  • Patrick J Strohbeen

    • New York University (NYU)

  • Frederick Knudsen

    • New York University (NYU)
    • NYU

  • Logan Kushner

    • New York University
    • New York University (NYU)

  • jechiel van Dijk

    • New York University

  • Arunav Bordoloi

    • University of Maryland College Park
    • New York University (NYU)
    • New York University

  • Krishna Dindial

    • New York University (NYU)

  • Javad Shabani

    • New York University

  View abstract →

• Small-Footprint Superconducting Qubits with Nb/Si/Nb Fin Capacitors

  ORAL

  March 17, 2026, 4:30 PM – March 17, 2026, 4:42 PM

  Presenters

  • Christian Gnandt

    • Walther-Meissner-Institute

  Authors

  • Christian Gnandt

    • Walther-Meissner-Institute

  • Leon Koch

    • TU Munich
    • TU Munich & Walther-Meissner-Institute
    • Walther-Meissner-Institute
    • TU Munich & Walther-Meißner-Institut
    • Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  • Niklas Bruckmoser

    • Walther-Meißner-Institute
    • TU Munich & Walther-Meissner-Institute
    • Walther-Meissner-Institute
    • Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  • Ivan Tsitsilin

    • Technical University Munich (TUM), Walther Meißner Institute (WMI)
    • TU Munich
    • TU Munich & Walther-Meissner-Institute
    • Walther-Meissner-Institute
    • Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  • Julius Feigl

    • Walther-Meissner-Insitute
    • Walther-Meissner-Institut
    • Walther-Meissner-Institute
    • TU Munich & Walther-Meißner-Institut
    • Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  • Daniil E Bazulin

    • TU Munich & Walther-Meissner-Institute
    • Walther-Meissner-Institute

  • Julian Englhardt

    • Walther-Meissner-Institute

  • Lea Richard

    • Walther Meissner Institut
    • TU Munich
    • Walther-Meissner-Institute
    • Walther-Meißner-Institut

  • David C Bunch

    • Walther-Meißner-Institut
    • Walther-Meissner-Institute

  • Lasse Södergren

    • Walther-Meissner-Institute
    • Walther-Meissner-Institut
    • Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  • Vera Bader

    • Walther-Meissner-Institut
    • Walther-Meissner-Institute
    • Walther-Meißner-Institut

  • Haiyang Hu

    • Walther-Meissner-Institute
    • Walther-Meißner-Institut

  • Stefan Filipp

    • Walther-Meißner-Institute
    • TU Munich
    • TU Munich & Walther-Meissner-Institute
    • Walther-Meissner-Institute
    • Walther-Meißner-Institut & TU Munich
    • TU Munich & Walther-Meißner-Institut
    • Walther Meissner Institute & TU Munich

  View abstract →

• Progress Towards Merged-Element Transmons Using Crystal Silicon Fins: The Silicon FinMET

  ORAL · Invited

  March 17, 2026, 4:42 PM – March 17, 2026, 5:18 PM

  Publication: A. Goswami, A. P. McFadden, T. Zhao, H. Inbar, J. T. Dong, R. Zhao, C. R. H. McRae, R. W. Simmonds, C. J. Palmstrøm, and D. P. Pappas, Towards merged-element transmons using silicon fins: The FinMET, Appl. Phys. Lett. 121, 064001 (2022).
  A. P. McFadden, A. Goswami, T. Y. Zhao, T. van Schijndel, T. F. Q. Larson, S. Sahu, S. Gill, F. Lecocq, R. Simmonds, and C. Palmstrom, Fabrication and characterization of low-loss Al/Si/Al parallel plate capacitors for superconducting quantum information applications, NPJ Quantum Information 11, 11 (2025).
  J. K. Nangoi, C. J. Palmstrom, and C. G. van de Walle, First-principles studies of Schottky barriers and tunneling properties at Al(111)/Si(111) and CoSi2(111)/Si(111) interfaces, Phys. Rev. B 110, 035302 (2024).

  Presenters

  • Chris J Palmstrom

    • University of California, Santa Barbara

  Authors

  • Chris J Palmstrom

    • University of California, Santa Barbara

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• Coherent and compact van der Waals transmon qubits

  ORAL

  March 17, 2026, 5:18 PM – March 17, 2026, 5:30 PM

  Presenters

  • Jesse Balgley

    • Columbia University

  Authors

  • Jesse Balgley

    • Columbia University

  • Jinho Park

    • Columbia University

  • Xuanjing Chu

    • Columbia University

  • Leonardo M Ranzani

    • Raytheon BBN Technologies
    • RTX BBN Technologies, Quantum Photonics and Computing Group, Cambridge, MA
    • RTX BBN Technologies

  • Martin V Gustafsson

    • RTX BBN Technologies

  • James C Hone

    • Columbia University

  • Kin Chung Fong

    • Northeastern University

  View abstract →

• Low-loss, ultra-thin AlOx films with specific resistances from (10² – 10¹⁰) Ω∙um²

  ORAL

  March 17, 2026, 5:30 PM – March 17, 2026, 5:42 PM

  Presenters

  • Runze Li

    • University of Maryland College Park

  Authors

  • Runze Li

    • University of Maryland College Park

  • Nikki Ebadollahi

    • University of Maryland College Park

  • Joshua Pomeroy

    • National Institute of Standards and Technology (NIST)

  View abstract →

• Epitaxial nitride-oxide trilayers for low-loss dielectrics in superconducting quantum circuits

  ORAL

  March 17, 2026, 5:42 PM – March 17, 2026, 5:54 PM

  Publication: Planned paper: Oxide-nitride heteroepitaxy for low-loss dielectrics in superconducting circuits

  Presenters

  • Peter Gilhwan Lim

    • Northwestern University

  Authors

  • Peter Gilhwan Lim

    • Northwestern University

  • David A Garcia-Wetten

    • Northwestern University

  • Mitchell J Walker

    • Northwestern University

  • André Vallières

    • Northwestern University

  • Maria G Jimenez Guillermo

    • Elmhurst University

  • Miguel A Alvarado

    • Northeastern Illinois University

  • Dominic P Goronzy

    • Northwestern University

  • Jens Koch

    • Northwestern University

  • Vinayak P Dravid

    • Northwestern University

  • Mark C Hersam

    • Northwestern University

  • Michael J Bedzyk

    • Northwestern University

  View abstract →

• Gap engineered - Asymmetric Josephson junctions for Quantum Information Processing

  ORAL

  March 17, 2026, 5:54 PM – March 17, 2026, 6:06 PM

  Presenters

  • Yashwanth Balaji

    • Lawrence Berkeley National Laboratory

  Authors

  • Yashwanth Balaji

    • Lawrence Berkeley National Laboratory

  • Mythili Surendran

    • Lawrence Berkeley National Lab

  • Asbjørn Drachmann

    • Niels Bohr Institute, University of Copenhagen
    • Neils Bohr Institute, University of Copenhagen

  • Qiao Liu

    • Lawrence Berkeley National Lab

  • Arian Gashi

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab

  • Peter Krogstrup

    • Niels Bohr Institute, University of Copenhagen
    • Niels Bohr Institute of Physics

  • Shaul Aloni

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab

  • Aeron T Hammack

    • Lawrence Berkeley National Labs

  • Adam Schwartzberg

    • Angstrom Engineering Inc.
    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab

  View abstract →

• Fabrication of Ta/TaOx/Nb Junctions for Superconducting Qubits with Reactive Magnetron Sputtering

  ORAL

  March 17, 2026, 6:06 PM – March 17, 2026, 6:18 PM

  Presenters

  • Jasmine Panthee

    • Northwestern University

  Authors

  • Jasmine Panthee

    • Northwestern University

  • Shaojiang Zhu

    • Fermi National Accelerator Laboratory (Fermilab)

  • Francesco Crisa

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

  • Sabrina Garattoni

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

  • Jaeyel Lee

    • Fermi National Accelerator Laboratory
    • Fermilab

  • Adam Lyon

    • 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

  • Mustafa Bal

    • Fermi National Accelerator Laboratory
    • Xanadu

  • Venkat Chandrasekhar

    • Northwestern University

  View abstract →

• Fabrication and Structural Analysis of Trilayers for Tantalum Josephson Junctions with Ta₂O₅ Barriers

  ORAL

  March 17, 2026, 6:18 PM – March 17, 2026, 6:30 PM

  Presenters

  • Raahul Potluri

    • University of Washington

  Authors

  • Raahul Potluri

    • University of Washington

  • Rohin Tangirala

    • University of Washington

  • Sage Bauers

    • National Renewable Energy Laboratory

  • Alejandro Barrios

    • Colorado School of Mines

  • Praveen Kumar

    • Colorado School of Mines

  • Peter V Sushko

    • Pacific Northwest National Laboratory (PNNL)

  • David P Pappas

    • Rigetti Computing

  • Serena Eley

    • Department of Electrical and Computer Engineering, University of Washington; Department of Physics, Colorado School of Mines

  View abstract →