Superconducting qubit decoherence correlated with detected radiation events
- URL: http://arxiv.org/abs/2512.18171v1
- Date: Sat, 20 Dec 2025 01:59:16 GMT
- Title: Superconducting qubit decoherence correlated with detected radiation events
- Authors: A. R. Castelli, K. M. Beck, L. D. H. Alegria, L. A. Martinez, K. R. Chaves, S. R. O'Kelley, N. Materise, J. L DuBois, Y. J. Rosen,
- Abstract summary: We present a platform that sandwiches a superconducting transmon qubit between two microwave kinetic inductance detector (MKID) arrays.<n>We observe statistically significant reductions in both $T$ and $T$-immediately following dual MKID events attributed to penetrating muons.<n>Our findings directly link radiating events to correlated qubit decoherence.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Most quantum error correction (QEC) protocols for superconducting qubits assume spatially and temporally uncorrelated decoherence events; however, recent evidence suggests that cosmic radiation induces spatially correlated errors. We present a platform that sandwiches a superconducting transmon qubit between two microwave kinetic inductance detector (MKID) arrays, enabling real-time detection of radiation-induced phonon bursts. By synchronizing MKID event detection with single-shot measurements of qubit energy relaxation ($T_1$) and phase coherence ($T_2$), we observe statistically significant reductions in both $T_1$ and $T_2$-up to 30.5%-immediately following dual MKID events attributed to penetrating muons. Our findings directly link radiating events to correlated qubit decoherence. Furthermore, our experimental platform provides a foundation for systematic studies of radiation effects, the development of shielding and mitigation techniques, and the refinement of error-correction algorithms tailored to correlated noise sources.
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