Squeezed, trisqueezed and quadsqueezed states via spin–oscillator coupling
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Subjects Quantum mechanicsQuantum simulation A method applied to a single trapped ion combines two linear spin-dependent interactions to generate nonlinear couplings in the ion’s motion: squeezing, trisqueezing and quadsqueezing interactions are demonstrated. The approach can be applied to any spin–oscillator system, produces stronger unitary interactions with the flexibility to switch quickly between orders, and scales seamlessly to higher orders and multiple oscillators. Access through your institution Buy or subscribe 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 Buy this articlePurchase on SpringerLinkInstant access to the full article PDF.USD 39.95Prices may be subject to local taxes which are calculated during checkout Fig. 1: Measured and simulated Wigner functions for states under higher-order interactions.The alternative text for this image may have been generated using AI. ReferencesLloyd, S. & Braunstein, S. L. Quantum computation over continuous variables. Phys. Rev. Lett. 82, 1784–1787 (1999). This paper introduces the notion of universal continuous variable quantum computing and motivates the need for non-Gaussianity.Article ADS Google Scholar Kang, M. et al. Seeking a quantum advantage with trapped-ion quantum simulations of condensed-phase chemical dynamics. Nat. Rev. Chem. 8, 340–358 (2024). This review article covering trapped-ion quantum-simulation approaches notes that applications beyond the linear vibronic regime require resources such as squeezing.Article Google Scholar Kenfack, A. & Życzkowski, K. Negativity of the Wigner function as an indicator of non-classicality. J. Opt. B 6, 396–404 (2004). This paper introduces Wigner negativity, which is used to quantify how strongly a quantum state departs from classical behaviour.Article ADS Google Scholar Sutherland, R. & Srinivas, R. Universal hybrid quantum computing in trapped ions. Phys. Rev. A 104, 032609 (2021). This paper sets out the theoretical proposal for the method that we have demonstrated in our present work.Article ADS Google Scholar Saner, S. et al. Real-time observation of Aharonov-Bohm interference in a Z2 lattice gauge theory on a hybrid qubit-oscillator quantum computer. Preprint at https://arxiv.org/abs/2507.19588 (2025). This paper presents a quantum simulation of a Z2 lattice gauge theory, which was enabled by extending our protocol to a multi-mode system.Download referencesAdditional informationPublisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.This is a summary of: Băzăvan, O. et al. Squeezing, trisqueezing and quadsqueezing in a hybrid oscillator–spin system. Nat. Phys. https://doi.org/10.1038/s41567-026-03222-6 (2026).Rights and permissionsReprints and permissionsAbout this articleCite this article Squeezed, trisqueezed and quadsqueezed states via spin–oscillator coupling. Nat. Phys. (2026). https://doi.org/10.1038/s41567-026-03224-4Download citationPublished: 05 May 2026Version of record: 05 May 2026DOI: https://doi.org/10.1038/s41567-026-03224-4Share 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 Squeezing, trisqueezing and quadsqueezing in a hybrid oscillator–spin system O. BăzăvanS. SanerR.
Srinivas Nature Physics Article Open Access 01 May 2026