High Purity OAM Entangled Photons from SPDC with Reduced Spatial Spectral Correlations
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Quantum Physics arXiv:2603.04578 (quant-ph) [Submitted on 4 Mar 2026] Title:High Purity OAM Entangled Photons from SPDC with Reduced Spatial Spectral Correlations Authors:F. Crislane V. de Brito, Sylwia Kolenderska, Piotr Kolenderski View a PDF of the paper titled High Purity OAM Entangled Photons from SPDC with Reduced Spatial Spectral Correlations, by F. Crislane V. de Brito and 2 other authors View PDF HTML (experimental) Abstract:Entanglement generated by Spontaneous Parametric Down Conversion (SPDC) involves multiple, often mutually correlated degrees of freedom. These degrees of freedom are often treated independently, overlooking the intrinsic correlation between them. We focus on the spatial spectral correlations that, if left uncontrolled, introduce distinguishability and reduce coherence, undermining applications such as high-dimensional OAM encoding. We analyze the spatio spectral structure of the biphoton and identify source configurations enabling a strong reduction of such correlations. We then quantify how spatial spectral coupling degrades OAM spatial purity, mapping high-purity regions as functions of OAM order, crystal length, and pump/collection waists. The resulting design parameters enable engineering bright, high purity OAM entangled sources, reducing the need for loss-introducing filtering and therefore supporting scalable high-dimensional photonic quantum technologies. Subjects: Quantum Physics (quant-ph); Optics (physics.optics) Cite as: arXiv:2603.04578 [quant-ph] (or arXiv:2603.04578v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.04578 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Francisca Crislane Vieira De Brito [view email] [v1] Wed, 4 Mar 2026 20:17:06 UTC (1,964 KB) Full-text links: Access Paper: View a PDF of the paper titled High Purity OAM Entangled Photons from SPDC with Reduced Spatial Spectral Correlations, by F. Crislane V. de Brito and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 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?) 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?)