WSi weak link element with a non-sinusoidal current-phase relation
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Quantum Physics arXiv:2605.20652 (quant-ph) [Submitted on 20 May 2026] Title:WSi weak link element with a non-sinusoidal current-phase relation Authors:Sarah Garcia Jones, Trevyn F. Q. Larson, Sai Pavan Chitta, Heli Vora, Varun Verma, Sae Woo Nam, José Aumentado, Jens Koch, Raymond W. Simmonds, András Gyenis View a PDF of the paper titled WSi weak link element with a non-sinusoidal current-phase relation, by Sarah Garcia Jones and 9 other authors View PDF HTML (experimental) Abstract:Nonlinearity is an essential ingredient for encoding quantum states with non-uniform energy spacing, implementing coherent quantum gates, reading out qubits, amplifying, and mixing electromagnetic signals. In this work, we demonstrate the nonlinear behavior of a constriction fabricated from an amorphous, high-kinetic inductance material, tungsten silicide, embedded in a three-dimensional RF-SQUID. We find that the results are consistent with the weak link behaving as a Josephson junction with a sawtooth-like current-phase relation or a quantum phase slip element. Finally, we measure relaxation times of the metastable, persistent-current states trapped in the local minima of the potential. Subjects: Quantum Physics (quant-ph); Superconductivity (cond-mat.supr-con) Cite as: arXiv:2605.20652 [quant-ph] (or arXiv:2605.20652v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.20652 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Andras Gyenis [view email] [v1] Wed, 20 May 2026 03:13:12 UTC (19,952 KB) Full-text links: Access Paper: View a PDF of the paper titled WSi weak link element with a non-sinusoidal current-phase relation, by Sarah Garcia Jones and 9 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-05 Change to browse by: cond-mat cond-mat.supr-con 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?) 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?)