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Channel-selective frequency up-conversion for frequency-multiplexed quantum network

Shoichi Murakami, Shunsuke Hiraoka, Toshiki Kobayashi, Takashi Yamamoto, Rikizo Ikuta
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⚡ Quantum Brief
Japanese researchers demonstrated a breakthrough in quantum frequency conversion, selectively up-converting telecom-wavelength photons (1540 nm) to visible light (780 nm) using cavity-enhanced second-order nonlinear optics. The team achieved channel-selective conversion within frequency-multiplexed signals, where specific input modes are precisely mapped to desired output modes via cavity resonance tuning, enabling targeted photon manipulation. Experimental results confirmed single-photon-level signal-to-noise ratios, validating the technique’s feasibility for channel-selective quantum frequency conversion (CS-QFC) in scalable quantum networks. The study highlights CS-QFC’s potential as a reconfigurable switch in frequency-multiplexed networks, critical for dynamic routing and selective Bell-state measurements between photons of differing frequencies. Proposed applications include advanced quantum repeaters and photonic interfaces, bridging telecom infrastructure with visible-light quantum processors for hybrid quantum communication systems.
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Quantum Physics arXiv:2511.16085 (quant-ph) [Submitted on 20 Nov 2025] Title:Channel-selective frequency up-conversion for frequency-multiplexed quantum network Authors:Shoichi Murakami, Shunsuke Hiraoka, Toshiki Kobayashi, Takashi Yamamoto, Rikizo Ikuta View a PDF of the paper titled Channel-selective frequency up-conversion for frequency-multiplexed quantum network, by Shoichi Murakami and 4 other authors View PDF HTML (experimental) Abstract:We demonstrate channel-selective frequency up-conversion from telecom wavelengths around 1540 nm for optical fiber communication to visible wavelengths around 780 nm, based on second-order optical nonlinearity in a cavity of the converted modes. In our experiment, we selectively convert a light from any frequency mode within frequency-multiplexed telecom signals to a desired output mode, determined by the cavity resonances. Based on the experimental results of the frequency up-conversion, we derive the signal-to-noise ratio of the process at the single-photon level, and discuss its applicability to channel-selective quantum frequency conversion (CS-QFC) in the context of frequency-multiplexed quantum networks. Finally, we describe specific use cases of the CS-QFC, which show its utility as a reconfigurable switching element in frequency-multiplexed networks, particularly for selectively performing Bell-state measurements between two photons originating from different frequencies. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2511.16085 [quant-ph] (or arXiv:2511.16085v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2511.16085 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Shoichi Murakami [view email] [v1] Thu, 20 Nov 2025 06:19:39 UTC (4,382 KB) Full-text links: Access Paper: View a PDF of the paper titled Channel-selective frequency up-conversion for frequency-multiplexed quantum network, by Shoichi Murakami and 4 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2025-11 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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