Title: Disentangling the sources of ionizing radiation in superconducting qubits

Journal Article · · European Physical Journal. C, Particles and Fields (Online)

Abstract Radioactivity was recently discovered as a source of decoherence and correlated errors for the real-world implementation of superconducting quantum processors. In this work, we measure levels of radioactivity present in a typical laboratory environment (from muons, neutrons, and $$$$\gamma $$$$ γ -rays emitted by naturally occurring radioactive isotopes) and in the most commonly used materials for the assembly and operation of state-of-the-art superconducting qubits. We present a GEANT-4 based simulation to predict the rate of impacts and the amount of energy released in a qubit chip from each of the mentioned sources. We finally propose mitigation strategies for the operation of next-generation qubits in a radio-pure environment.

Research Organization:
CNR, INO, Pisa; Central Florida U.; Colorado U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Gran Sasso; INFN, Aquila; INFN, Milan Bicocca; INFN, Rome; Milan Bicocca U.; NIST, Boulder; Northwestern U.; Queen's U., Kingston; Rigetti Computing; Rome U.; Rome U., Tor Vergata
Sponsoring Organization:
US Department of Energy; USDOE
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1922865
Report Number(s):
FERMILAB-PUB-22-903-SQMS-TD; 94; PII: 11199
Journal Information:
European Physical Journal. C, Particles and Fields (Online), Journal Name: European Physical Journal. C, Particles and Fields (Online) Journal Issue: 1 Vol. 83; ISSN 1434-6052
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Germany
Language:
English

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