{"id":161,"date":"2026-02-24T09:48:35","date_gmt":"2026-02-24T01:48:35","guid":{"rendered":"https:\/\/chronos.phy.ncu.edu.tw\/?page_id=161"},"modified":"2026-04-15T10:00:02","modified_gmt":"2026-04-15T02:00:02","slug":"documents","status":"publish","type":"page","link":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/documents\/","title":{"rendered":"Documents"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">CHRONOS White Paper<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This white paper is an official document that comprehensively presents the scientific goals, technical design, international collaboration framework, and long-term development plan of<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cryogenic sub-Hz cROss torsion-bar detector with quantum NOn-demolition Speed meter (CHRONOS).<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CHRONOS is a next-generation interferometer project aiming at the detection of gravitational waves in the sub-Hz frequency band, particularly targeting the stochastic gravitational-wave background.<br>By integrating cryogenic torsion-bar technology with quantum non-demolition (QND) speed-meter interferometry, CHRONOS seeks to achieve low-frequency sensitivity beyond that of conventional position-meter interferometers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This document includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scientific background and the significance of stochastic gravitational-wave observations<\/li>\n\n\n\n<li>Detector concept and optical configuration<\/li>\n\n\n\n<li>Quantum-noise reduction strategies and mirror-coating development<\/li>\n\n\n\n<li>Calibration methods and systematic-error evaluation<\/li>\n\n\n\n<li>Data analysis strategies (CBC and stochastic background searches)<\/li>\n\n\n\n<li>International collaboration structure and development roadmap<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">We invite researchers, students, and collaborators to use this document as a foundational reference for understanding the scientific vision and technical strategy of the CHRONOS project.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-purple-color\">\u25b6\u00a0<\/mark><\/strong><a href=\"https:\/\/arxiv.org\/abs\/2603.10070\">Download White Paper (arXiv)<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Last update: 2026 Mar.11<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"1024\" src=\"https:\/\/chronos.phy.ncu.edu.tw\/wp-content\/uploads\/2026\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-03-11-0.25.57-723x1024.png\" alt=\"\" class=\"wp-image-176\" srcset=\"https:\/\/chronos.phy.ncu.edu.tw\/wp-content\/uploads\/2026\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-03-11-0.25.57-723x1024.png 723w, https:\/\/chronos.phy.ncu.edu.tw\/wp-content\/uploads\/2026\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-03-11-0.25.57-212x300.png 212w, https:\/\/chronos.phy.ncu.edu.tw\/wp-content\/uploads\/2026\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-03-11-0.25.57-768x1088.png 768w, https:\/\/chronos.phy.ncu.edu.tw\/wp-content\/uploads\/2026\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-03-11-0.25.57.png 1060w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"CHRONOS White Paper This white paper is an official document that comprehensively presents the scientific goals, technical design, international collaboration framework, and long-term development plan of Cryogenic sub-Hz cROss torsion-bar detector with quantum NOn-demolition Speed meter (CHRONOS). CHRONOS is a next-generation interferometer project aiming at the detection of gravitational waves in the sub-Hz frequency band, [&hellip;]","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-161","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/comments?post=161"}],"version-history":[{"count":4,"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/161\/revisions"}],"predecessor-version":[{"id":190,"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/161\/revisions\/190"}],"wp:attachment":[{"href":"https:\/\/chronos.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/media?parent=161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}