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Entangled photon triplets using lithium niobate nanophotonics

arXiv Quantum Physics
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⚡ Quantum Brief
Researchers achieved a breakthrough in multiphoton generation by producing entangled photon triplets at 237 kHz/mW efficiency—over 2,000 times higher than previous methods (previously <100 Hz/mW). The team integrated two cascaded down-converters on a single thin-film lithium niobate waveguide, dramatically enhancing triplet production rates for quantum applications. The second down-converter’s 4.4×10⁻⁵ success probability sets a new benchmark, exceeding prior sources by an order of magnitude and paving the way for MHz-scale triplet generation. This advancement addresses a critical bottleneck in quantum computing and communication, where multiphoton states are essential but historically difficult to generate efficiently. Published in December 2025, the work demonstrates lithium niobate nanophotonics as a scalable platform for high-rate multiphoton entanglement, accelerating practical quantum technology development.
Entangled photon triplets using lithium niobate nanophotonics

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Quantum Physics arXiv:2512.24053 (quant-ph) [Submitted on 30 Dec 2025] Title:Entangled photon triplets using lithium niobate nanophotonics Authors:Nathan A. Harper, Ayantika Sengupta, Emily Y. Hwang, Scott K. Cushing View a PDF of the paper titled Entangled photon triplets using lithium niobate nanophotonics, by Nathan A. Harper and 3 other authors View PDF Abstract:Multiphoton states are needed for quantum communication and computation. Multiphoton states are significantly more difficult to generate than one- and two-photon states because two individual down-conversion processes must be cascaded. Only efficiencies of $ new | recent | 2025-12 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?)

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Source: arXiv Quantum Physics