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Seismometry of radiation-induced quasiparticle bursts in superconducting devices

Francesco Valenti1,*,†, Anil Murani1,*,‡, Patrick Paluch1,2, Robert Gartmann3, Lukas Scheller3, Richard Weller3, Robert Kruk4, Thomas Reisinger1, Luis Ardila-Perez3 et al.

Ioan M. Pop1,2,5,§

  • *These authors contributed equally to this work.
  • †Present address: IBM Quantum, IBM T. J. Watson Research Center, Yorktown Heights, 10598 New York, USA.
  • ‡Present address: Alice & Bob, 75015 Paris, France.
  • §Contact author: ioan.pop@kit.edu

Phys. Rev. B 113, 174504 – Published 12 May, 2026

DOI: https://doi.org/10.1103/xmyw-yc9h

Abstract

We perform nanosecond-resolution multiplexed readout on six same-chip superconducting microwave resonators. This allows us to pinpoint the position of ionizing radiation impacts on the chip by measuring the differential time-of-flight of the generated phonons, inducing correlated errors in the device, thereby implementing an on-chip seismic array. We correlate the phase response of each resonator—a proxy for the absorbed energy—to the distance from the impact point to uncover a millimetric characteristic length for the phonon-mediated radiation poisoning.

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