{"id":223,"date":"2018-04-23T07:26:06","date_gmt":"2018-04-23T07:26:06","guid":{"rendered":"http:\/\/www.milq.info\/?page_id=223"},"modified":"2026-07-10T08:06:08","modified_gmt":"2026-07-10T06:06:08","slug":"m11_experiment_von_grangier_roger_aspect","status":"publish","type":"page","link":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/","title":{"rendered":"The experiment of Grangier, Roger and Aspect"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p><\/p>\n<p>The experiment with detectors described here was carried out as a real experiment in 1986 by the French physicists Grangier, Roger and Aspect<sup>1<\/sup>. The problem was to produce individual photons in a controlled way. As a source of individual photons, this experiment used calcium atoms which, following laser excitation into a higher-lying s state, could only return to the ground state by emitting two photons, for reasons of angular-momentum conservation. One of the two photons fell on the beam splitter; the other was detected separately and indicated that a photon was indeed present in the apparatus. In this way, individual photons could be handled in a controlled manner.<\/p>\n<hr \/>\n<p><sup>1<\/sup> Grangier, Philippe; Roger, G\u00e9rard; Aspect, Alain: Experimental evidence for a photon anticorrelation effect on a beamsplitter,<br \/>\nEurophys. Lett. 1 (1986), p. 173.<\/p>\n<p><a href=\"https:\/\/www.milq.info\/en\/mehr\/3-wellen-und-teilchen\/\">Back<\/a><\/p>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>The experiment with detectors described here was carried out as a real experiment in 1986 by the French physicists Grangier, Roger and Aspect1. The problem was to produce individual photons in a controlled way. As a source of individual photons, this experiment used calcium atoms which, following laser excitation into a higher-lying s state, could&hellip; <a href=\"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">The experiment of Grangier, Roger and Aspect<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-223","page","type-page","status-publish","hentry","without-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The experiment of Grangier, Roger and Aspect - milq<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The experiment of Grangier, Roger and Aspect - milq\" \/>\n<meta property=\"og:description\" content=\"The experiment with detectors described here was carried out as a real experiment in 1986 by the French physicists Grangier, Roger and Aspect1. 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The problem was to produce individual photons in a controlled way. As a source of individual photons, this experiment used calcium atoms which, following laser excitation into a higher-lying s state, could&hellip; Continue reading The experiment of Grangier, Roger and Aspect","og_url":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/","og_site_name":"milq","article_modified_time":"2026-07-10T06:06:08+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/","url":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/","name":"The experiment of Grangier, Roger and Aspect - milq","isPartOf":{"@id":"https:\/\/www.milq.info\/en\/#website"},"datePublished":"2018-04-23T07:26:06+00:00","dateModified":"2026-07-10T06:06:08+00:00","breadcrumb":{"@id":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":[["https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/"]]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.milq.info\/en\/m11_experiment_von_grangier_roger_aspect\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Startseite","item":"https:\/\/www.milq.info\/en\/"},{"@type":"ListItem","position":2,"name":"Das Experiment von Grangier, Roger und Aspect"}]},{"@type":"WebSite","@id":"https:\/\/www.milq.info\/en\/#website","url":"https:\/\/www.milq.info\/en\/","name":"milq","description":"Quantenphysik in der Schule","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.milq.info\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/pages\/223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/comments?post=223"}],"version-history":[{"count":5,"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/pages\/223\/revisions"}],"predecessor-version":[{"id":2746,"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/pages\/223\/revisions\/2746"}],"wp:attachment":[{"href":"https:\/\/www.milq.info\/en\/wp-json\/wp\/v2\/media?parent=223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}