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Deterministic Multi-User Identification over Bosonic Channels

arXiv Quantum Physics
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⚡ Quantum Brief
Researchers Gökhan Elmas and Janis Nötzel introduced a quantum framework for deterministic multi-user identification using bosonic channels, published in April 2026. Their model replaces classical shared codebooks with coherent-state signatures. Each user is assigned a unique coherent product state under energy constraints, enabling identification via user-specific binary quantum tests. This approach maps receivers to geometric signatures in high-dimensional phase space. The study demonstrates near-k log k scaling in identification capacity, leveraging metric entropy bounds. This scaling suggests significant efficiency gains over classical methods for large user networks. Unlike traditional models, this quantum approach eliminates the need for shared codebooks, reducing complexity while maintaining deterministic identification. The work bridges quantum physics and information theory. Potential applications include secure quantum networks, where efficient user authentication is critical. The findings could advance quantum communication protocols and multi-user quantum cryptography systems.
Deterministic Multi-User Identification over Bosonic Channels

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Quantum Physics arXiv:2604.22804 (quant-ph) [Submitted on 13 Apr 2026] Title:Deterministic Multi-User Identification over Bosonic Channels Authors:Gökhan Elmas, Janis Nötzel View a PDF of the paper titled Deterministic Multi-User Identification over Bosonic Channels, by G\"okhan Elmas and 1 other authors View PDF HTML (experimental) Abstract:We study deterministic multi-user identification over bosonic channels using coherent-state signatures. Each user is assigned a coherent product state under an average energy constraint, and identification is performed by a user-specific binary quantum test. In contrast to classical multi-user identification models based on shared codebooks, this formulation associates each receiver with a geometric signature in high-dimensional phase space. Using metric entropy bounds, we show that the identification capacity exhibits a near-k log k scaling behavior. Subjects: Quantum Physics (quant-ph); Information Theory (cs.IT) Cite as: arXiv:2604.22804 [quant-ph] (or arXiv:2604.22804v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2604.22804 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Gökhan Elmas [view email] [v1] Mon, 13 Apr 2026 21:35:46 UTC (17 KB) Full-text links: Access Paper: View a PDF of the paper titled Deterministic Multi-User Identification over Bosonic Channels, by G\"okhan Elmas and 1 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-04 Change to browse by: cs cs.IT math math.IT 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