Quantum optical synthesis of high-dimensional ultrafast frequency-bin qudits
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Quantum Physics arXiv:2605.14314 (quant-ph) [Submitted on 14 May 2026] Title:Quantum optical synthesis of high-dimensional ultrafast frequency-bin qudits Authors:Prasad Koviri (1), Tomoya Okita (1), Rina Yabumoto (1), Yuta Fujihashi (1), Masahiro Yabuno (2), Hirotaka Terai (2), Shigehito Miki (2), Kali P. Nayak (1), Ryosuke Shimizu (1,3) ((1) Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan, (2) Advanced ICT Research Institute, National Institute of Information and Communications Technology, Hyogo, Japan, (3) Institute for Advanced Science, The University of Electro-Communications, Tokyo, Japan) View a PDF of the paper titled Quantum optical synthesis of high-dimensional ultrafast frequency-bin qudits, by Prasad Koviri (1) and 19 other authors View PDF Abstract:Frequency modes of light are one of the most promising platforms that provide access to high-dimensional quantum states amongst different photonic degrees of freedom capable of high-dimensionality, enabling robust, error-tolerant, and scalable quantum optical information systems. We demonstrate engineering of precisely controlled two-photon high-dimensional states entangled in frequency through time-domain Fourier optical synthesis. We generate and convert a continuous broadband frequency-entangled state into a large range of discrete frequency bins suitable for ITU standards, with spacings ranging from 12.5 GHz to 750 GHz, and observe spectral anticorrelations over 38 frequency bins, including intra-bin pure states at a 100 GHz bin spacing. We characterize the full quantum state dimensionality via Schmidt decomposition and observe lower bounds on the frequency-binned Hilbert-space dimensionalities of at least 289, formed by two entangled qudits with dimension 17. Furthermore, we demonstrate quantum nonlocality via frequency correlations in a transmission experiment over a campus-scale two-node fiber network. This work represents a crucial step towards building a versatile and relatively simple way of generating precisely controlled high-dimensional spectral qudits, with the potential of harnessing in wavelength-multiplexed quantum networks, high-dimensional information processing, and communication of quantum states specifically, and fiber-optic quantum remote sensing. Comments: Subjects: Quantum Physics (quant-ph); Optics (physics.optics) Cite as: arXiv:2605.14314 [quant-ph] (or arXiv:2605.14314v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.14314 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Prasad Koviri [view email] [v1] Thu, 14 May 2026 03:24:08 UTC (1,109 KB) Full-text links: Access Paper: View a PDF of the paper titled Quantum optical synthesis of high-dimensional ultrafast frequency-bin qudits, by Prasad Koviri (1) and 19 other authorsView PDF view license Current browse context: quant-ph new | recent | 2026-05 Change to browse by: physics physics.optics 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?)