Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits
Summarize this article with:
Quantum Physics arXiv:2602.12773 (quant-ph) [Submitted on 13 Feb 2026] Title:Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits Authors:Oscar W. Kennedy, Waqas Ahmad, Robert Armstrong, Amir Awawdeh, Anirban Bose, Kevin G. Crawford, Sergey Danilin, William D. David, Hamid El Maazouz, Darren J. Hayton, George B. Long, Alexey Lyapin, Scott A. Manifold, Kowsar Shahbazi, Ryan Wesley, Evan Wong, Connor D. Shelly View a PDF of the paper titled Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits, by Oscar W. Kennedy and 16 other authors View PDF HTML (experimental) Abstract:Packages capable of supporting large arrays of high-coherence superconducting qubits are vital for the realisation of fault-tolerant quantum computers and the necessary high-throughput metrology required to optimise fabrication and manufacturing processes. We present a wafer-scale packaging architecture supporting over 500 qubits on a single 3-inch die. The package is engineered to suppress parasitic RF modes, and to mitigate material loss through simulation-informed design while managing differential thermal contraction to ensure robust operation at millikelvin temperatures. System-level heat-load calculations from a large wiring payload show this package may be operated in commercial dilution refrigerators. Measurements of the qubits loaded into the package show median $T_1$, $T_{2e} \sim 100~\mu$s ($\sim$100 qubits) alongside readout with median fidelity of 97.5% (54 qubits) and a median qubit temperature of 36 mK (54 qubits). These results validate the performance of these packages and demonstrate that large-scale integration can be achieved without compromising device performance. Finally, we highlight the utility of these packages as a tool for high throughput feedback on qubit figures of merit over large sample sizes, allowing identification of performance outliers in the tails of the coherence distribution, a critical capability for informing fabrication and manufacture of high-quality quantum qubits and quantum processors. Comments: Subjects: Quantum Physics (quant-ph); Applied Physics (physics.app-ph); Instrumentation and Detectors (physics.ins-det) Cite as: arXiv:2602.12773 [quant-ph] (or arXiv:2602.12773v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2602.12773 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Oscar W Kennedy [view email] [v1] Fri, 13 Feb 2026 09:58:30 UTC (4,638 KB) Full-text links: Access Paper: View a PDF of the paper titled Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits, by Oscar W. Kennedy and 16 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-02 Change to browse by: physics physics.app-ph physics.ins-det References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) Links to Code Toggle Papers with Code (What is Papers with Code?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)