{"id":225143,"date":"2025-11-15T00:19:28","date_gmt":"2025-11-15T06:19:28","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/11\/hd%e2%81%ba-ions-cooled-to-18-mk-yield-most-precise-vibrational-rotational-spectra-to-date"},"modified":"2025-11-15T00:19:28","modified_gmt":"2025-11-15T06:19:28","slug":"hd%e2%81%ba-ions-cooled-to-18-mk-yield-most-precise-vibrational-rotational-spectra-to-date","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/11\/hd%e2%81%ba-ions-cooled-to-18-mk-yield-most-precise-vibrational-rotational-spectra-to-date","title":{"rendered":"HD\u207a ions cooled to 18 mK yield most precise vibrational-rotational spectra to date"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/hde281ba-ions-cooled-to-18-mk-yield-most-precise-vibrational-rotational-spectra-to-date.jpg\"><\/a><\/p>\n<p>A research team from the Innovation Academy for Precision Measurement Science and Technology (APM) of the Chinese Academy of Sciences has made significant progress in precisely measuring the vibrational-rotational spectra of hydrogen molecular ions (HD\u207a).<\/p>\n<p>The researchers prepared a Be\u207a-HD\u207a two-component ion Coulomb crystal at millikelvin temperatures in a linear ion trap. They developed an innovative quantum state preparation and spatially resolved fluorescence detection techniques and used these to measure the high-resolution vibrational-rotational transition spectra of HD\u207a molecular ions. Their findings were <a href=\"https:\/\/link.aps.org\/doi\/10.1103\/qxyn-jx1t\" target=\"_blank\">published<\/a> in Physical Review A.<\/p>\n<p>HD\u207a is the simplest heteronuclear molecular ion, composed of one proton, one deuteron, and one electron. Its vibrational-rotational transition energies can be precisely calculated, making it an ideal system for testing quantum electrodynamics (QED) theory and determining <a href=\"https:\/\/phys.org\/tags\/fundamental+physical+constants\/\" rel=\"tag\" class=\"\">fundamental physical constants<\/a>, such as the proton-electron mass ratio.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A research team from the Innovation Academy for Precision Measurement Science and Technology (APM) of the Chinese Academy of Sciences has made significant progress in precisely measuring the vibrational-rotational spectra of hydrogen molecular ions (HD\u207a). The researchers prepared a Be\u207a-HD\u207a two-component ion Coulomb crystal at millikelvin temperatures in a linear ion trap. They developed an [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1522,1617],"tags":[],"class_list":["post-225143","post","type-post","status-publish","format-standard","hentry","category-innovation","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/225143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=225143"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/225143\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=225143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=225143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=225143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}