{"data":{"id":2161,"lang":"en","title":"Scientists Generate Quantum Entanglement Directly From Sunlight for the First Time","summary":"Physicists in Canada and Germany produced quantum-entangled photons from concentrated sunlight for the first time, reaching 94% fidelity without using a laser.","category":"science","category_label":"Science","published_at":"2026-08-10T06:01:27Z","updated_at":"2026-08-10T06:01:27Z","url":"https://techtools.cz/tools/news/article/2161-scientists-generate-quantum-entanglement-directly-from-sunlight-for-the-first","api_url":"https://techtools.cz/news-api/v1/articles/2161?lang=en","markdown_url":"https://techtools.cz/news-api/v1/articles/2161.md?lang=en","image_url":"https://www.sciencedaily.com/images/1920/quantum-entanglement-using-sunlight.webp","word_count":132,"reading_time_minutes":1,"sources":[{"url":"https://www.sciencedaily.com/releases/2026/08/260807035133.htm","domain":"sciencedaily.com"},{"url":"https://www.eurekalert.org/news-releases/1138247","domain":"eurekalert.org"}],"translation":{"lang":"cs","id":2234,"title":"Vědci poprvé vytvořili kvantové provázání přímo ze slunečního světla","url":"https://techtools.cz/tools/news/clanek/2234-vedci-poprve-vytvorili-kvantove-provazani-primo-ze-slunecniho-svetla","api_url":"https://techtools.cz/news-api/v1/articles/2234?lang=cs"},"content":"Researchers from the University of Ottawa and Germany's Max Planck Institute for the Science of Light have generated quantum-entangled photons using ordinary sunlight instead of a laser, a feat long thought impossible because sunlight lacks the coherence lasers provide.\n\nThe team, led by graduate student Cheng Li under physicist Robert Boyd, concentrated sunlight through a household-window-sized Fresnel lens into an optical fiber roughly the width of a human hair, then fed it into a millimeter-scale nonlinear crystal to trigger spontaneous parametric down-conversion, splitting photons into entangled pairs. Quantum state tomography confirmed a fidelity of about 94%, nearly matching laser-based setups.\n\nThe result, published in the journal Optica, points toward quantum technologies that do not depend on power-hungry lasers, including satellites that could generate secure encryption keys from sunlight already abundant in orbit."}}