{"id":6815,"date":"2025-05-05T00:00:00","date_gmt":"2025-05-04T22:00:00","guid":{"rendered":"https:\/\/micronora-informations.fr\/?p=6244"},"modified":"2025-05-05T00:00:00","modified_gmt":"2025-05-04T22:00:00","slug":"etalon-quantique-pour-lampere","status":"publish","type":"post","link":"https:\/\/micronora.com\/en\/etalon-quantique-pour-lampere\/","title":{"rendered":"\u00c9talon quantique pour l\u2019amp\u00e8re"},"content":{"rendered":"
\n
\"L\u2019\u00e9talon
L\u2019\u00e9talon quantique de courant fournit une r\u00e9alisation de la d\u00e9finition de l\u2019amp\u00e8re \u00e0 partir de la charge \u00e9l\u00e9mentaire et de la fr\u00e9quence Josepshon. Source : LNE<\/figcaption><\/figure>\n<\/div>\n\n\n

Apr\u00e8s huit ans de travail, les chercheurs du Laboratoire national de m\u00e9trologie et d\u2019essais (LNE), en collaboration avec un chercheur de Physikalisch-Technische Bundesanstalt (PTB) en Allemagne, viennent de mettre au point un nouvel \u00e9talon quantique g\u00e9n\u00e9rant des courants \u00e0 des valeurs parfaitement quantifi\u00e9es, ne n\u00e9cessitant aucune correction. Il est fond\u00e9 sur la combinaison des \u00e9talons quantiques de tension Josephson, de r\u00e9sistance de Hall et d\u2019un amplificateur supraconducteur combin\u00e9s dans un circuit quantique original. La d\u00e9monstration de l\u2019exactitude des courants g\u00e9n\u00e9r\u00e9s, aux valeurs quantifi\u00e9es \u00b1(n\/p) efJ (o\u00f9 n et p sont des param\u00e8tres de contr\u00f4le entiers et fJ est la fr\u00e9quence de Josephson), a \u00e9t\u00e9 faite avec des incertitudes relatives inf\u00e9rieures \u00e0 10 milliardi\u00e8mes et dans la gamme des microamp\u00e8res. L’amp\u00e8re peut donc d\u00e9sormais \u00eatre r\u00e9alis\u00e9 sur une large gamme de valeurs de courant avec des incertitudes plus faibles de deux ordres de grandeur que les meilleures capacit\u00e9s d\u2019\u00e9talonnage des instituts nationaux de m\u00e9trologie. Cette d\u00e9monstration a n\u00e9cessit\u00e9 la mise en \u0153uvre d’une instrumentation comprenant cinq dispositifs quantiques, le nouvel \u00e9talon de courant quantique \u00e9tant au c\u0153ur de cet ensemble. Cette instrumentation quantique compl\u00e8te jette les bases d’une r\u00e9alisation quantique universelle des unit\u00e9s \u00e9lectriques, de tension, de courant et m\u00eame de r\u00e9sistance, dans une seule exp\u00e9rience. Dans cette perspective, les r\u00e9frig\u00e9rateurs sans fluide cryog\u00e9nique et les dispositifs quantiques fonctionnant dans des conditions exp\u00e9rimentales moins extr\u00eames, tels que ceux fond\u00e9s sur le graph\u00e8ne ou les isolants topologiques magn\u00e9tiques, simplifieront la mise en place et le fonctionnement de l’exp\u00e9rience, rendant ainsi la r\u00e9alisation d’unit\u00e9s \u00e9lectriques plus pratique et performante.<\/p>\n\n\n\n

www.lne.fr<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Apr\u00e8s huit ans de travail, les chercheurs du Laboratoire national […]<\/p>\n","protected":false},"author":7,"featured_media":1765980337,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76,105,118,82],"tags":[],"class_list":["post-6815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metrologie-mesure-controle","category-micronora-informations","category-n167","category-rd-produits-et-sous-traitance"],"yoast_head":"\n\u00c9talon quantique pour l\u2019amp\u00e8re - Micronora<\/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:\/\/micronora.com\/en\/etalon-quantique-pour-lampere\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u00c9talon quantique pour l\u2019amp\u00e8re - Micronora\" \/>\n<meta property=\"og:description\" content=\"Apr\u00e8s huit ans de travail, les chercheurs du Laboratoire national [...]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/micronora.com\/en\/etalon-quantique-pour-lampere\/\" \/>\n<meta property=\"og:site_name\" content=\"Micronora\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-04T22:00:00+00:00\" \/>\n<meta name=\"author\" content=\"Micronora\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Micronora\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/\"},\"author\":{\"name\":\"Micronora\",\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/#\\\/schema\\\/person\\\/4ea0df71205cbc62ca8df3645af563ee\"},\"headline\":\"\u00c9talon quantique pour l\u2019amp\u00e8re\",\"datePublished\":\"2025-05-04T22:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/\"},\"wordCount\":348,\"image\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/micronora.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/167-016-001-vign.jpg\",\"articleSection\":[\"M\u00e9trologie - mesure - contr\u00f4le\",\"Micronora informations\",\"N\u00b0167\",\"R&D, produits et sous-traitance\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/\",\"url\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/\",\"name\":\"\u00c9talon quantique pour l\u2019amp\u00e8re - Micronora\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/micronora.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/167-016-001-vign.jpg\",\"datePublished\":\"2025-05-04T22:00:00+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/#\\\/schema\\\/person\\\/4ea0df71205cbc62ca8df3645af563ee\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/micronora.com\\\/en\\\/etalon-quantique-pour-lampere\\\/#primaryimage\",\"url\":\"https:\\\/\\\/micronora.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/167-016-001-vign.jpg\",\"contentUrl\":\"https:\\\/\\\/micronora.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/167-016-001-vign.jpg\",\"width\":425,\"height\":320,\"caption\":\"L\u2019\u00e9talon quantique de courant fournit une r\u00e9alisation de la d\u00e9finition de l\u2019amp\u00e8re \u00e0 partir de la charge \u00e9l\u00e9mentaire et de la fr\u00e9quence Josepshon. 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