Two is company and three is a quantum interface

Magnetic-field-resilient granular aluminium mediates nonlinear interactions in a microwave cavity–magnon system, enabling tripartite entanglement with implications for quantum transduction and detection. This is a preview of subscription content, access via your institution Access options Access through your institution Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription $32.99 / 30 days cancel any time Learn more Subscribe to this journal Receive 12 print issues and online access $259.00 per year only $21.58 per issue Learn more Rent or buy this article Prices vary by article type from$1.95 to$39.95 Learn more Prices may be subject to local taxes which are calculated during checkout Fig. 1: Mechanical analogue of the tripartite coupling introduced by Fruy, Théry and colleagues. Subjects Condensed-matter physics Physics ReferencesBochmann, J., Vainsencher, A., Awschalom, D. D. & Cleland, A. N. Nat. Phys. 9, 712–716 (2013).Article CAS Google Scholar Andrews, R. W. et al. Nat. Phys. 10, 321–326 (2014).Article CAS Google Scholar Tabuchi, Y. et al. Science 349, 405–408 (2015).Article PubMed CAS Google Scholar Lachance-Quirion, D., Tabuchi, Y., Gloppe, A., Usami, K. & Nakamura, Y. Appl. Phys. Express 12, 070101 (2019).Article CAS Google Scholar Hei, X.-L., Li, P.-B., Pan, X.-F. & Nori, F. Phys. Rev. Lett. 130, 073602 (2023).Article PubMed CAS Google Scholar Fruy, C. et al. Nat. Mater. https://doi.org/10.1038/s41563-026-02585-8 (2026).Article PubMed Google Scholar Winkel, P. et al. Phys. Rev. X 10, 031032 (2020).CAS Google Scholar Théry, A. et al. Phys. Rev. B 109, 064505 (2024).Article Google Scholar Günzler, S. et al. Nat. Commun. 16, 9564 (2025).Article PubMed PubMed Central Google Scholar Maleeva, N. et al. Nat. Commun. 9, 3889 (2018).Article PubMed PubMed Central CAS Google Scholar Download referencesAuthor informationAuthors and AffiliationsIQMT, Karlsruhe Institute of Technology, Karlsruhe, GermanyIoan M. PopPHI, Karlsruhe Institute of Technology, Karlsruhe, GermanyIoan M. PopPhysics Institute 1, University of Stuttgart, Stuttgart, GermanyIoan M. PopAuthorsIoan M. PopView author publicationsSearch author on:PubMed Google ScholarCorresponding authorCorrespondence to Ioan M. Pop.Ethics declarations Competing interests The author declares no competing interests. Rights and permissionsReprints and permissionsAbout this articleCite this articlePop, I.M. Two is company and three is a quantum interface. Nat. Mater. (2026). https://doi.org/10.1038/s41563-026-02674-8Download citationPublished: 05 August 2026Version of record: 05 August 2026DOI: https://doi.org/10.1038/s41563-026-02674-8Share this articleAnyone you share the following link with will be able to read this content:Get shareable linkSorry, a shareable link is not currently available for this article.Copy shareable link to clipboard Provided by the Springer Nature SharedIt content-sharing initiative Observation of strong tripartite coupling in a cavity-quantum circuit-antiferromagnet platform C. FruyA. ThéryT.

Kontos Nature Materials Letter Open Access 16 Apr 2026