Name: Radiation Impacts in Superconducting Qubits 2026 (RISQ26)
Start: 2026-06-15T08:00:00-05:00
End: 2026-06-18T18:00:00-05:00
Location: University of Wisconsin, Madison

Radiation Impacts in Superconducting Qubits 2026 (RISQ26)

from Monday 15 June 2026 (08:00) to Thursday 18 June 2026 (18:00)

Monday 15 June 2026
08:45 Morning Session
Morning Session
08:45 - 10:35
Contributions

08:45 Intro/Welcome - Jared Yamaoka

09:00 Current and Near-Term G4CMP physics capabilities - Ryan Linehan (Fermi National Accelerator Laboratory)

09:30 G4CMP Consortium, Github Organization, and Project Planning - Birgit Zatschler

09:50 Extending G4CMP for Charge Transport in Sapphire: Applications to Dark Matter and Radiation Detection - Israel Hernandez (Illinois Institute of Technology)

10:05 Coupling G4CMP Athermal Phonon Transport to TES Readout Physics for SuperCDMS HVeV Detector Response - David Sadek

10:20 Analysis of Event Position Dependence in HVeV Detectors with G4CMP and MEMS - Caitlyn Stone-Whitehead (Colorado School of Mines)
10:35 Coffee
Coffee
10:35 - 10:55
10:55 Morning Session II
Morning Session II
10:55 - 12:10
Contributions

10:55 Design Insights for Direct Absorber Phonon-Mediated Detectors from G4CMP - Selby Dang (SLAC)

11:10 Modeling of Radiation Impact Physics and Phonon Dynamics at PNNL - Jake Inman

11:25 Modeling the scrambling of two-level systems due to radiation impacts - Eric Mascot

11:40 A Physics-based, AI-accelerated Codesign Approach for the Optimization of Superconducting Quantum Circuits - Paul Baity (Brookhaven National Laboratory)

11:55 Optical illumination of spin qubits for G4CMP - David Kealhofer
12:10 Lunch
Lunch
12:10 - 13:40
13:40 Afternoon Session
Afternoon Session
13:40 - 15:10
Contributions

13:40 Introductory Tutorial - Jake Inman Jesse Lutz

13:40 Advanced G4CMP Features Tutorial - Ryan Linehan (Fermi National Accelerator Laboratory)
15:10 Coffee
Coffee
15:10 - 15:30
15:30 Afternoon Session II
Afternoon Session II
15:30 - 17:30
Contributions

15:30 S3DF Demonstration - Stefan Zatschler (SLAC)

16:15 Discussion
Tuesday 16 June 2026
09:00 Kick-Off
Kick-Off
09:00 - 10:15
Contributions

09:00 Kick-Off & Welcome - Britton Plourde

09:15 Plenary Overview - Daniel Baxter (Fermi National Accelerator Laboratory)
10:15 Coffee
Coffee
10:15 - 10:45
10:45 Industry
Industry
10:45 - 12:00
Contributions

10:45 Correlated Error Bursts in a Gap-Engineered Superconducting Qubit Array - Alex Opremcak (Google Quantum AI)

11:15 Fast Measurements of the Impacts of Ionizing Radiation on Superconducting Qubits - Bradley Christensen (Northrop Grumman)
12:00 Lunch
Lunch
12:00 - 13:30
13:30 Afternoon Session
Afternoon Session
13:30 - 15:15
Contributions

13:30 Recovery Dynamics of a Gap-Engineered Transmon after a Quasiparticle Burst - Heekun Nho (Yale University)

14:00 Detection of Spatiotemporally Correlated Errors in OCS Transmons and Fluxonium - Jeffrey Gertler (MIT Lincoln Laboratory)

14:30 Phonon-Only Events and Correlated Quasiparticle Poisoning - Britton Plourde (University of Wisconsin, Madison)
15:15 Coffee
Coffee
15:15 - 15:45
15:45 Backgrounds
Backgrounds
15:45 - 17:30
Contributions

15:45 Using Classical Athermal Phonon Sensor Technology as a Complementary Tool to Understand Quasiparticle Poisoning in Qubits - Matt Pyle (University of California, Berkeley)

16:15 Qubit error bursts in superconducting quantum processors of Quantum Inspire: quasiparticle pumping and anomalous time dependence - Marios Samiotis (QuTech & Kavli Institute of Nanoscience, Delft University of Technology)

16:45 QUALIPHIDE-FIR dark matter experiment and LEE - Lanqing Yuan (Washington University in St. Louis)
17:30 Conference Photo
Conference Photo
17:30 - 17:35

17:35 Poster Session
Poster Session
17:35 - 19:30
Wednesday 17 June 2026
09:00 Theory Primer
Theory Primer
09:00 - 10:15
Contributions

09:00 Effect of quasiparticles on the parameters of a gap-engineered transmon - Leonid I. Glazman (Yale University)

09:30 Correlated Error Bursts in a Gap-Engineered Superconducting Qubit Array - Gabrielle Roberts (Google Quantum AI)
10:15 Coffee
Coffee
10:15 - 10:45
10:45 Co-located Sensors
Co-located Sensors
10:45 - 12:30
Contributions

10:45 The LLNL Cosmic Sandwich – an experimental and theoretical approach towards understanding non-equilibrium energy deposition in superconducting devices - Yaniv Rosen (LLNL)

11:15 A Cryogenic Muon Tagging System Integrated with a Superconducting Qubit Device for Radiation-Induced Error Mitigation - Tanay Roy (FNAL)

11:45 Combining qubit arrays and TES sensors to understand and mitigate the effects of background radiation - Joel Ullom (NIST)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 Chip Response - Calibration & Modeling
Chip Response - Calibration & Modeling
14:00 - 15:45
Contributions

14:00 Progress at the CLIQUE Facility - Tom McJunkin (Johns Hopkins Applied Physics Laboratory)

14:30 Measuring and modeling the impact of radiation on superconducting qubits protected through gap engineering - Doug Pinckney (MIT)

15:00 Radioassay of Materials in Superconducting Qubit Systems and Development of Alpha-Decay Calibration Sources for Radiation Upset Studies - Isaac Arnquist (PNNL)

15:15 Alphas as a Source of Chip-Wide Correlated Errors - Samuel Watkins (Pacific Northwest National Laboratory)
15:45 Coffee
Coffee
15:45 - 16:15
16:15 Spin Qubits - Overlapping Communities
Spin Qubits - Overlapping Communities
16:15 - 17:30
Contributions

16:15 Radiation-induced offset charge jumps in Si/SiGe quantum dot qubits - Mark Eriksson (University of Wisconsin-Madison)

16:45 Investigating Effects of Gamma Radiation on Spin Qubits in HRL SLEDGE Devices - Joshua Lou (University of Maryland)
17:30 Poster Session
Poster Session
17:30 - 19:30
Thursday 18 June 2026
09:00 Chip Response - Event Reconstruction
Chip Response - Event Reconstruction
09:00 - 10:45
Contributions

09:00 Response of qubits to particles and thermal phonons - Alberto Ressa (Istituto Nazionale di Fisica Nucleare)

09:30 Particle impact energy reconstruction using transmons - Emanuela Celi (Northwestern University)

10:00 SQUATs: Qubit-Based Sensors for Dark Matter - Hannah Magoon (Stanford University)
10:45 Coffee
Coffee
10:45 - 11:15
11:15 Wrap-Up
Wrap-Up
11:15 - 12:45
Contributions

11:15 G4CMP Workshop Summary

11:45 Close-Out

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