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Correlated quasiparticle poisoning from phonon-only events in superconducting qubits

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arxiv 2503.09554 v1 pith:UB6TSCJQ submitted 2025-03-12 quant-ph cond-mat.supr-con

E. Yelton , C. P. Larson , K. Dodge , K. Okubo , B. L. T. Plourde This is my paper
classification quant-phcond-mat.supr-con
keywords eventscorrelatedpoisoningqubitsratesourcesuperconductingbursts
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Throughout multiple cooldowns we observe a power-law reduction in time for the rate of multi-qubit correlated poisoning events, while the rate of shifts in qubit offset-charge remains constant; evidence of a non-ionizing source of pair-breaking phonon bursts for superconducting qubits. We investigate different types of sample packaging, some of which are sensitive to mechanical impacts from the cryocooler pulse tube. One possible source of these events comes from relaxation of thermally-induced stresses from differential thermal contraction between the device layer and substrate.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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

    quant-ph 2025-09 conditional novelty 6.0 of 10

    Cryogenic alternating voltage bias scrambles the frequencies of strongly coupled two-level systems in amorphous alumina, an effect reversed by thermal cycling above 10 K.

  2. Effect of quasiparticles on the parameters of a gap-engineered transmon

    cond-mat.supr-con 2025-07 conditional novelty 6.0 of 10

    In a gap-engineered transmon, quasiparticles cause a resonant enhancement of frequency shift and relaxation when the qubit frequency matches the gap difference, giving a new spectroscopic probe.

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