New Capacitors, Josephson Junctions, and Mergemons

Presentations

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

  Oral-In-person

  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

  • Christopher Freestone

    • Caltech

  • Shuhul Mujoo

    • Caltech

  • Benjamin Boone

  • Sara Magdalena Gomez

    • Caltech

  • Oskar Painter

    • Caltech

  View abstract →

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

  Oral-In-person

  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

  • Gihwan Kim

    • Caltech

  • Benjamin Boone

  • Shuhul Mujoo

    • Caltech

  • Sara Magdalena Gomez

    • Caltech

  • Oskar Painter

    • Caltech

  View abstract →

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

  Oral-In-person

  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 Sementilli

  • Zihuai Zhang

    • University of California, Berkeley

  • Nikitha Chalgeri

    • University of California, Berkeley

  • Haoxin Zhou

    • University of California, Berkeley

  • Alp Sipahigil

    • University of California, Berkeley

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Leo Sementilli

    • University of California, Berkeley

  Authors

  • Leo Sementilli

    • University of California, Berkeley

  • Kangdi Yu

    • University of California, Berkeley

  • Zihuai Zhang

    • University of California, Berkeley

  • Nikitha Chalgeri

    • University of California, Berkeley

  • Haoxin Zhou

    • University of California, Berkeley

  • Alp Sipahigil

    • University of California, Berkeley

  View abstract →

• Group IV Fully Crystalline Josephson Junctions for Scalable Superconducting Qubits

  Oral-In-person

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

  Presenters

  • Frederik Holst Knudsen

    • New York University (NYU)

  Authors

  • Axel Leblanc

    • New York University (NYU)

  • Patrick Strohbeen

    • Massachusetts Institute of Technology

  • Frederik Holst Knudsen

    • New York University (NYU)

  • Logan Kusher

    • New York University (NYU)

  • jechiel van Dijk

    • New York University (NYU)

  • Arunav Bordoloi

    • New York University (NYU)

  • Krishna Dindial

    • New York University (NYU)

  • Javad Shabani

    • New York University (NYU)

  View abstract →

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

  Oral-In-person

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

  Presenters

  • Christian Gnandt

    • Walther Meissner Inst

  Authors

  • Christian Gnandt

    • Walther Meissner Inst

  • Leon Koch

    • Technical University of Munich

  • Niklas Bruckmoser

    • Technical University of Munich

  • Ivan Tsitsilin

    • Technical University of Munich

  • Julius Feigl

  • Daniil Bazulin

  • Julian Englhardt

  • Lea Richard

    • Walther Meissner Inst

  • David Bunch

    • Walther Meissner Inst

  • Lasse Södergren

  • Vera Bader

  • Haiyang Hu

  • Stefan Filipp

    • Technical University of Munich

  View abstract →

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

  Invited-In-person · 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 Palmstrom

    • University of California, Santa Barbara

  Authors

  • Chris Palmstrom

    • University of California, Santa Barbara

  View abstract →

• Coherent and compact van der Waals transmon qubits

  Oral-In-person

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

  Presenters

  • Jesse Balgley

    • Columbia University

  Authors

  • Jesse Balgley

    • Columbia University

  • Jinho Park

    • Seoul Natl Univ

  • Xuanjing Chu

    • Columbia University

  • Leonardo Ranzani

    • Raytheon Integrated Air & Missile Defense

  • Martin Gustafsson

  • James Hone

    • Columbia University

  • Kin Chung Fong

  View abstract →

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

  Oral-In-person

  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-In-person

  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 Garcia-Wetten

    • Northwestern University

  • Mitchell Walker

  • André Vallières

    • Northwestern University

  • Maria Jimenez Guillermo

    • Elmhurst College

  • Miguel Alvarado

  • Dominic Goronzy

    • Northwestern University

  • Jens Koch

    • Northwestern University

  • Vinayak Dravid

    • Northwestern University

  • Mark Hersam

    • Northwestern University

  • Michael Bedzyk

    • Northwestern University

  View abstract →

• Gap engineered - Asymmetric Josephson junctions for Quantum Information Processing

  Oral-In-person

  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

  • Asbjørn Drachmann

  • Qiao Liu

  • Arian Gashi

  • Peter Krogstrup

    • Niels Bohr Institute, University of Copenhagen

  • Shaul Aloni

  • Aeron Hammack

    • Lawrence Berkeley National Laboratory

  • Adam Schwartzberg

    • Lawrence Berkeley National Laboratory

  View abstract →

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

  Oral-In-person

  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

  • sabrina garattoni

    • Fermi National Accelerator Laboratory (Fermilab)

  • Jae-Yel Lee

    • Fermi National Accelerator Laboratory

  • Adam Lyon

    • Fermi National Accelerator Laboratory (Fermilab)

  • Akshay Murthy

    • Fermi National Accelerator Laboratory (Fermilab)

  • Anna Grassellino

    • Fermi National Accelerator Laboratory (Fermilab)

  • Mustafa Bal

  • Venkat Chandrasekhar

    • Northwestern University

  View abstract →

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

  Oral-In-person

  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

  • Praveen Kumar

  • Peter Sushko

    • Pacific Northwest National Laboratory (PNNL)

  • David Pappas

    • Rigetti Computing

  • Serena Eley

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

  View abstract →