{"id":14047,"date":"2013-08-23T03:00:51","date_gmt":"2013-08-23T08:00:51","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=14047"},"modified":"2013-08-23T03:00:51","modified_gmt":"2013-08-23T08:00:51","slug":"about-that-perfect-clock","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/14047","title":{"rendered":"About That Perfect Clock\u2026"},"content":{"rendered":"<p><a href=\"http:\/\/phys.org\/news\/2013-08-physicist-impossibility-quantum-crystals.html\">Physicist proves impossibility of quantum time crystals<\/a><\/p>\n<blockquote><p>Bruno&#8217;s proof demonstrates that setting a system of particles in motion around a one-dimensional magnetic ring always increases the ground-state energy of the system so that it&#8217;s no longer in its ground state, which prohibits the existence of a rotating ground-state system. The proof covers systems rotating at any finite angular velocity.<\/p><\/blockquote>\n<p>I had <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/12472\">linked to this<\/a> some time back because the press release was bad and made some overly bold extrapolations. Interesting that a periodic system as described can&#8217;t be in a ground state.<\/p>\n<p>There are also probably a couple of &#8220;I reject quantum theory&#8221; crackpots who will be disappointed, as this seems to rule out some of the favorite classical atom models. Oh, who am I kidding. They are impervious.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Physicist proves impossibility of quantum time crystals Bruno&#8217;s proof demonstrates that setting a system of particles in motion around a one-dimensional magnetic ring always increases the ground-state energy of the system so that it&#8217;s no longer in its ground state, &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/14047\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[],"class_list":["post-14047","post","type-post","status-publish","format-standard","hentry","category-physics"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/14047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/comments?post=14047"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/14047\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=14047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=14047"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=14047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}