Quantum State Certification via Effective Parent Hamiltonians from Local Measurement Data
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Quantum Physics arXiv:2603.04499 (quant-ph) [Submitted on 4 Mar 2026] Title:Quantum State Certification via Effective Parent Hamiltonians from Local Measurement Data Authors:Guy-Philippe Nadon, Guanyi Heng, Pacôme Gasnier, Antoine Lemelin, Camille Coti, Zeljko Zilic, Mikko Möttönen, Ville Kotovirta, Toni Annala, Ernesto Campos, Jacob Biamonte View a PDF of the paper titled Quantum State Certification via Effective Parent Hamiltonians from Local Measurement Data, by Guy-Philippe Nadon and 10 other authors View PDF HTML (experimental) Abstract:The preparation and certification of quantum states is a fundamental challenge across quantum information technology. We introduce a tomography-free state certification method that lower-bounds the fidelity by estimating expectation values of engineered parent-Hamiltonian terms from local measurement data. We apply this framework to construct a parent Hamiltonian that enables certification and variational optimization across the Dicke-state family, which includes the single-excitation $W_n$ state. We experimentally validate the framework on IBM quantum hardware, certifying genuine multipartite entanglement for $W_n$ states up to six qubits and establishing positive lower bounds on the state fidelity up to thirteen qubits. For Dicke states with two- and three-excitations, we certify genuine multipartite entanglement up to seven qubits. Within this stringent certification framework, these results constitute among the largest witness-certified demonstrations of such states on a programmable quantum processor. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.04499 [quant-ph] (or arXiv:2603.04499v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.04499 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Antoine Lemelin [view email] [v1] Wed, 4 Mar 2026 19:00:02 UTC (283 KB) Full-text links: Access Paper: View a PDF of the paper titled Quantum State Certification via Effective Parent Hamiltonians from Local Measurement Data, by Guy-Philippe Nadon and 10 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 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?)