{"id":133945,"date":"2022-01-12T08:23:43","date_gmt":"2022-01-12T16:23:43","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2022\/01\/symmetries-reveal-clues-about-the-holographic-universe"},"modified":"2022-01-12T08:23:43","modified_gmt":"2022-01-12T16:23:43","slug":"symmetries-reveal-clues-about-the-holographic-universe","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2022\/01\/symmetries-reveal-clues-about-the-holographic-universe","title":{"rendered":"Symmetries Reveal Clues About the Holographic Universe"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/symmetries-reveal-clues-about-the-holographic-universe2.jpg\"><\/a><\/p>\n<p>We\u2019ve known about gravity since Newton\u2019s apocryphal encounter with the apple, but we\u2019re still struggling to make sense of it. While the other three forces of nature are all due to the activity of quantum fields, our best theory of gravity describes it as bent space-time. For decades, physicists have tried to use quantum field theories to describe gravity, but those efforts are incomplete at best.<\/p>\n<p>One of the most promising of those efforts treats gravity as something like a hologram \u2014 a three-dimensional effect that pops out of a flat, two-dimensional surface. Currently, the only concrete example of such a theory is the <a href=\"https:\/\/www.quantamagazine.org\/albert-einstein-holograms-and-quantum-gravity-20181114\/\">AdS\/CFT correspondence<\/a>, in which a particular type of quantum field theory, called a conformal field theory (CFT), gives rise to gravity in so-called anti-de Sitter (AdS) space. In the bizarre curves of AdS space, a finite boundary can encapsulate an infinite world. <a href=\"https:\/\/www.ias.edu\/scholars\/maldacena\">Juan Maldacena<\/a>, the theory\u2019s discoverer, has called it a \u201cuniverse in a bottle.\u201d<\/p>\n<p>But our universe isn\u2019t a bottle. <a href=\"https:\/\/www.quantamagazine.org\/what-is-the-geometry-of-the-universe-20200316\/\">Our universe is (largely) flat<\/a>. Any bottle that would contain our flat universe would have to be infinitely far away in space and time. Physicists call this cosmic capsule the \u201ccelestial sphere.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We\u2019ve known about gravity since Newton\u2019s apocryphal encounter with the apple, but we\u2019re still struggling to make sense of it. While the other three forces of nature are all due to the activity of quantum fields, our best theory of gravity describes it as bent space-time. For decades, physicists have tried to use quantum field [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1923,1617],"tags":[],"class_list":["post-133945","post","type-post","status-publish","format-standard","hentry","category-holograms","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/133945","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\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=133945"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/133945\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=133945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=133945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=133945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}