--- title: Researchers Show Sunlight Can Generate Quantum Entanglement description: Researchers from the Max Planck Institute and University of Ottawa have demonstrated for the first time that concentrated sunlight can generate... canonical: https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Researchers Show Sunlight Can Generate Quantum Entanglement | daily.dev og:description: Researchers from the Max Planck Institute and University of Ottawa have demonstrated for the first time that concentrated sunlight can generate... og:url: https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj og:image: https://api.daily.dev/og/posts/dsDx29NQj.png og:image:alt: Researchers Show Sunlight Can Generate Quantum Entanglement og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Researchers Show Sunlight Can Generate Quantum Entanglement **[The Quantum Insider](https://daily.dev/sources/thequantuminsider)** · 6 min read · 0 upvotes · 0 comments ## Summary Researchers from the Max Planck Institute and University of Ottawa have demonstrated for the first time that concentrated sunlight can generate quantum-entangled photon pairs via spontaneous parametric down-conversion (SPDC), achieving nearly 94% fidelity and violating Bell's inequality. The team built a custom solar concentrator collecting light over 1.4 square meters and funneling it into a nonlinear crystal. The key insight is that sunlight's incoherence in spatial/temporal degrees of freedom does not prevent polarization entanglement, as long as the pump beam remains polarized. Efficiency normalized against pump power matches laser-driven SPDC. The findings open possibilities for sunlight-powered quantum communication and sensing systems in satellites, deep-space missions, and remote environments where lasers are impractical. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Can sunlight be used instead of a laser to generate quantum-entangled photons? Yes, concentrated sunlight can generate quantum-entangled photon pairs via spontaneous parametric down-conversion (SPDC) with nearly 94% fidelity, close to laser performance. A solar concentrator collects light over 1.4 square meters and funnels it into a nonlinear crystal. Sunlight's spatial and temporal incoherence does not prevent polarization entanglement, and efficiency normalized against pump power is on par with laser-driven SPDC. _Researchers tracking quantum photonics breakthroughs like this one follow the field on daily.dev._ ### What fidelity was achieved in sunlight-driven quantum entanglement experiments? Sunlight-driven SPDC produced polarization-entangled photon pairs with a fidelity of nearly 94%, and the photon correlations violated Bell's inequality, confirming genuine quantum entanglement rather than classical correlations. When normalized against pump power and effective bandwidth, the efficiency matched that of laser-driven entanglement generation. _Teams building quantum sensing or communication systems find relevant research developments on daily.dev._ ## Similar posts on daily.dev - [An electrically powered source of entangled light on a chip](https://daily.dev/posts/an-electrically-powered-source-of-entangled-light-on-a-chip-xwhcrdvuk) · Phys.org · 1 upvotes · 0 comments - [From Spooky Action to Quantum Internet: Communication Takes to the Air](https://daily.dev/posts/from-spooky-action-to-quantum-internet-communication-takes-to-the-air-mejaqgq56) · Embedded.com · 0 upvotes · 0 comments - [In Step Toward Quantum Networking, Penn Study Finds Quantum Light Pattern Can Survive Loss of Entanglement](https://daily.dev/posts/in-step-toward-quantum-networking-penn-study-finds-quantum-light-pattern-can-survive-loss-of-entang-lhnm1ckqp) · The Quantum Insider · 0 upvotes · 0 comments --- Tags: [#quantum-computing](https://daily.dev/tags/quantum-computing) [View this post on daily.dev](https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Researchers Show Sunlight Can Generate Quantum Entanglement","url":"https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj"},"datePublished":"2026-08-07T13:34:32.849Z","dateModified":"2026-08-07T13:34:57.037Z","description":"Researchers from the Max Planck Institute and University of Ottawa have demonstrated for the first time that concentrated sunlight can generate...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/acef1f7a79185afd508bf9e9f0eea93b?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/acef1f7a79185afd508bf9e9f0eea93b?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"The Quantum Insider","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"The Quantum Insider","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/7b14a6b34c1b464c9e8a88d9a0dac951","url":"https://daily.dev/sources/thequantuminsider"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"quantum-computing","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The Quantum Insider","item":"https://daily.dev/sources/thequantuminsider"},{"@type":"ListItem","position":3,"name":"Researchers Show Sunlight Can Generate Quantum Entanglement"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/researchers-show-sunlight-can-generate-quantum-entanglement-dsdx29nqj#faq","mainEntity":[{"@type":"Question","name":"Can sunlight be used instead of a laser to generate quantum-entangled photons?","acceptedAnswer":{"@type":"Answer","text":"Yes, concentrated sunlight can generate quantum-entangled photon pairs via spontaneous parametric down-conversion (SPDC) with nearly 94% fidelity, close to laser performance. 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