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Certification of genuine non-Gaussian entanglement

arXiv Quantum Physics
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⚡ Quantum Brief
Researchers from European institutions introduced a method to certify "genuine non-Gaussian entanglement," distinguishing it from entanglement achievable via Gaussian processes. This breakthrough addresses a fundamental gap in quantum resource characterization. The study identifies entangled states that cannot be created through Gaussian evolution acting on separable states, exposing inherent limitations of Gaussian operations in quantum systems. Non-Gaussian operations emerge as essential for advanced quantum applications. A novel certification framework directly links entanglement theory with quantum non-Gaussianity, a critical feature for quantum computing and communication. The method is tailored for states producible in current quantum optics experiments. The team demonstrated the certification on entangled Fock states and hybrid entangled states, proving its practical applicability. These states are particularly relevant for photonic quantum technologies. This work provides experimentalists with a tool to verify non-Gaussian entanglement, accelerating the development of quantum devices that rely on non-classical correlations beyond Gaussian constraints.
Certification of genuine non-Gaussian entanglement

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Quantum Physics arXiv:2604.22295 (quant-ph) [Submitted on 24 Apr 2026] Title:Certification of genuine non-Gaussian entanglement Authors:Lukáš Lachman, Carlos E. Lopetegui-González, Massimo Frigerio, Mattia Walschaers View a PDF of the paper titled Certification of genuine non-Gaussian entanglement, by Luk\'a\v{s} Lachman and 2 other authors View PDF HTML (experimental) Abstract:Entanglement is a key resource for many quantum applications. Understanding fundamental properties of entangled states is an important step towards their practical exploitation. We characterize entanglement in the context of Gaussian and non-Gaussian processes and identify entangled states that cannot be produced by any Gaussian evolution acting on separable states. This distinction exposes intrinsic limitations of Gaussian operations and highlights the role of non-Gaussian operations as an important resource. We apply this framework to develop a certification method that connects entanglement theory with quantum non-Gaussianity - an advanced quantum feature that is essential for several quantum applications. Our approach tailors the certification to experimentally relevant states that can be produced in current quantum optics experiments. We demonstrate this certification for recognizing the genuine non-Gaussian entanglement of various entangled Fock states and hybrid entangled states. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.22295 [quant-ph] (or arXiv:2604.22295v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2604.22295 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Lukas Lachman [view email] [v1] Fri, 24 Apr 2026 07:25:54 UTC (420 KB) Full-text links: Access Paper: View a PDF of the paper titled Certification of genuine non-Gaussian entanglement, by Luk\'a\v{s} Lachman and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-04 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?)

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Source: arXiv Quantum Physics