{"id":8630,"date":"2025-10-16T20:23:01","date_gmt":"2025-10-16T18:23:01","guid":{"rendered":"https:\/\/joapen.com\/blog\/?p=8630"},"modified":"2025-10-16T20:23:04","modified_gmt":"2025-10-16T18:23:04","slug":"micius-quantum-satellite","status":"publish","type":"post","link":"https:\/\/joapen.com\/blog\/2025\/10\/16\/micius-quantum-satellite\/","title":{"rendered":"Micius Quantum Satellite"},"content":{"rendered":"\n<p>The Micius satellite, formally known as the Quantum Experiments at Space Scale (QUESS) satellite, is the world&#8217;s first quantum communications satellite that has established a global quantum communication network.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are the core capabilities and experimental achievements of Micius?<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>High-Speed Satellite-to-Ground Quantum Key Distribution (QKD):<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Function:<\/strong> It is capable of sending an <strong>unconditionally secure encryption key<\/strong> (quantum key) from the satellite down to a ground station using photons (qubits). The security is guaranteed by the laws of quantum mechanics.<\/li>\n\n\n\n<li><strong>Achievement:<\/strong> Successfully demonstrated QKD over distances of up to 1,200 kilometers, achieving a key generation rate significantly higher than would be possible with a terrestrial fiber link over that distance.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Quantum Entanglement Distribution over Long Distances:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Function:<\/strong> The satellite has an onboard source to generate pairs of <strong>entangled photons<\/strong> (photons whose quantum states are linked, regardless of distance) and send one photon from the pair to each of two widely separated ground stations.<\/li>\n\n\n\n<li><strong>Achievement:<\/strong> Distributed entangled photons to two ground stations separated by over <strong>1,200 kilometers<\/strong>, which is a record distance for preserving quantum entanglement. This feat is crucial for future quantum repeaters and the quantum internet.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Ground-to-Satellite Quantum Teleportation:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Function:<\/strong> Successfully performed quantum teleportation, where the <em>quantum state<\/em> of a photon on the ground is transferred to a distant photon (that is part of an entangled pair) held by the satellite.<\/li>\n\n\n\n<li><strong>Achievement:<\/strong> Demonstrated quantum teleportation from a ground station to the satellite over distances ranging from 500 to 1,400 kilometers.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Enabling Intercontinental Quantum Communication:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Function:<\/strong> By acting as a <strong>&#8220;trusted relay,&#8221;<\/strong> Micius receives a quantum key from one ground station and then sends the same key to a second, geographically distant ground station, linking them securely.<\/li>\n\n\n\n<li><strong>Achievement:<\/strong> Used as a trusted relay to perform <strong>intercontinental quantum key distribution<\/strong> between China and Europe (e.g., between Beijing and Vienna, separated by approx 7,600 km), which was then used to secure a video conference.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>More things to be followed up.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Micius satellite, formally known as the Quantum Experiments at Space Scale (QUESS) satellite, is the world&#8217;s first quantum communications satellite that has established a global quantum communication network. What are the core capabilities and experimental achievements of Micius? More things to be followed up.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[270],"tags":[],"class_list":["post-8630","post","type-post","status-publish","format-standard","hentry","category-quantum-computing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Micius Quantum Satellite -<\/title>\n<meta name=\"description\" content=\"The Micius satellite, formally known as the Quantum Experiments at Space Scale (QUESS) satellite, is the world&#039;s first quantum communications satellite - joapen projects\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/joapen.com\/blog\/2025\/10\/16\/micius-quantum-satellite\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Micius Quantum Satellite -\" \/>\n<meta property=\"og:description\" content=\"The Micius satellite, formally known as the Quantum Experiments at Space Scale (QUESS) satellite, is the world&#039;s first quantum communications satellite - 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