{"id":213663,"date":"2025-05-09T17:11:37","date_gmt":"2025-05-09T22:11:37","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/05\/loop-quantum-cosmology-may-explain-smoothness-of-cosmic-microwave-background"},"modified":"2025-05-09T17:11:37","modified_gmt":"2025-05-09T22:11:37","slug":"loop-quantum-cosmology-may-explain-smoothness-of-cosmic-microwave-background","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/05\/loop-quantum-cosmology-may-explain-smoothness-of-cosmic-microwave-background","title":{"rendered":"Loop quantum cosmology may explain smoothness of cosmic microwave background"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/loop-quantum-cosmology-may-explain-smoothness-of-cosmic-microwave-background.webp\"><\/a><\/p>\n<p>Repulsive gravity at the quantum scale would have flattened out inhomogeneities in the early universe.<\/p>\n<p>In classical physics, gravity is universally attractive. At the quantum level, however, this may not always be the case. If vast quantities of matter are present within an infinitesimally small volume \u2013 at the centre of a black hole, for example, or during the very earliest moments of the universe \u2013 spacetime becomes curved at scales that approach the Planck length. This is the fundamental quantum unit of distance, and is around 10<sup>20<\/sup> times smaller than a proton.<\/p>\n<p>In these extremely curved regions, the classical theory of gravity \u2013 Einstein\u2019s general theory of relativity \u2013 breaks down. However, research on loop quantum cosmology offers a possible solution. It suggests that gravity, in effect, becomes repulsive. Consequently, loop quantum cosmology predicts that our present universe began in a so-called \u201ccosmic bounce\u201d, rather than the Big Bang singularity predicted by general relativity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Repulsive gravity at the quantum scale would have flattened out inhomogeneities in the early universe. In classical physics, gravity is universally attractive. At the quantum level, however, this may not always be the case. If vast quantities of matter are present within an infinitesimally small volume \u2013 at the centre of a black hole, for [\u2026]<\/p>\n","protected":false},"author":661,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,1617,64],"tags":[],"class_list":["post-213663","post","type-post","status-publish","format-standard","hentry","category-cosmology","category-quantum-physics","category-singularity"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/213663","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\/661"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=213663"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/213663\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=213663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=213663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=213663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}