{"id":29008,"date":"2026-02-06T04:57:35","date_gmt":"2026-02-06T04:57:35","guid":{"rendered":"https:\/\/gsrra.com\/?p=29008"},"modified":"2026-02-06T04:57:38","modified_gmt":"2026-02-06T04:57:38","slug":"chinese-scientists-achieve-major-breakthrough-in-scalable-quantum-networks","status":"publish","type":"post","link":"https:\/\/gsrra.com\/?p=29008","title":{"rendered":"Chinese scientists achieve major breakthrough in scalable quantum networks"},"content":{"rendered":"\n
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A research team from the University of Science and Technology of China (USTC) has achieved significant advances in the field of scalable quantum networks, bringing this transformative technology closer to real-world applications. Their landmark findings have been published in both Nature and Science.<\/p>\n\n\n\n

A central goal of quantum information science is the creation of highly efficient and ultra-secure quantum networks, which require the long-distance distribution of quantum entanglement — a phenomenon involving a unique connection between particles. Such entanglement is essential to enable quantum-secure communication and interconnect future quantum computers. A major obstacle, however, has been signal loss in optical fibers, where transmission efficiency drops drastically with distance, making large-scale networks impractical.<\/p>\n\n\n\n

To address this issue, the team focused on a concept known as a “quantum repeater,” which breaks a long communication link into shorter segments, establishes entanglement within each, and then connects them. The key challenge has been that quantum entanglement is typically too short-lived to outlast the time needed to link segments, preventing the repeater from functioning effectively.<\/p>\n\n\n\n

The USTC team overcame this fundamental limitation by developing a long-lived trapped-ion quantum memory, a highly efficient ion-photon interface, and a high-fidelity experimental protocol. Together, these innovations enabled quantum entanglement that persists significantly longer than the time required to establish inter-segment connections.<\/p>\n\n\n\n

According to USTC, this is the world’s first demonstration of a scalable building block for a quantum repeater — a critical step toward long-distance quantum networks.<\/p>\n\n\n\n

In a related breakthrough, the team used similar technology to generate high-fidelity entanglement between two distant rubidium atoms. Leveraging this, they demonstrated device-independent quantum key distribution (DI-QKD) over city-scale fiber networks for the first time.<\/p>\n\n\n\n

DI-QKD is regarded as the gold standard for secure communication, as its security is guaranteed by the laws of quantum physics, independent of any potential device flaws.<\/p>\n\n\n\n

The team successfully implemented DI-QKD over 11 kilometers of fiber, extending the attainable distance approximately 3,000 times beyond previous results. They also confirmed the feasibility of generating secure keys over a distance of 100 kilometers, surpassing the prior international record by more than two orders of magnitude.<\/p>\n\n\n\n

The researchers have hailed these outcomes as pivotal milestones for China in the field of quantum communication and networking, signaling that fiber-based quantum networks are advancing from a theoretical concept toward practical implementation.<\/p>\n\n\n\n

Reference Link:- https:\/\/english.news.cn\/20260206\/992b2802126548b49c468da638d9e676\/c.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

A research team from the University of Science and Technology of China (USTC) has achieved significant advances in the field of scalable quantum networks, bringing this transformative technology closer to real-world applications. Their landmark findings have been published in both Nature and Science. A central goal of quantum information science is the creation of highly […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2],"tags":[26755,2307,26756,26754,24665,9982],"class_list":["post-29008","post","type-post","status-publish","format-aside","hentry","category-sample-category","tag-breaktrhough","tag-china-3","tag-quantum-network","tag-quantum-technology-2","tag-sci-tech-4","tag-scientists-2","post_format-post-format-aside"],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/posts\/29008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gsrra.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29008"}],"version-history":[{"count":1,"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/posts\/29008\/revisions"}],"predecessor-version":[{"id":29010,"href":"https:\/\/gsrra.com\/index.php?rest_route=\/wp\/v2\/posts\/29008\/revisions\/29010"}],"wp:attachment":[{"href":"https:\/\/gsrra.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gsrra.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gsrra.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}