{"id":822202,"date":"2021-12-02T15:35:11","date_gmt":"2021-12-02T15:35:11","guid":{"rendered":"https:\/\/projects.ift.uam-csic.es\/holotube\/?p=822202"},"modified":"2021-12-08T11:31:14","modified_gmt":"2021-12-08T11:31:14","slug":"december-7-computing-quantum-corrections-to-black-holes-in-semi-classical-gravity-by-ben-freivogel","status":"publish","type":"post","link":"https:\/\/projects.ift.uam-csic.es\/holotube\/2021\/12\/02\/december-7-computing-quantum-corrections-to-black-holes-in-semi-classical-gravity-by-ben-freivogel\/","title":{"rendered":"December 7: &#8220;Computing Quantum Corrections to Black Holes in Semi-Classical Gravity&#8221; by Ben Freivogel"},"content":{"rendered":"\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\"  style=\"display: block; margin: 0px auto;\"  id=\"_ytid_27328\"  width=\"1170\" height=\"658\"  data-origwidth=\"1170\" data-origheight=\"658\" src=\"https:\/\/www.youtube.com\/embed\/k0pZa7B2jlI?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=1&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;\" class=\"__youtube_prefs__  epyt-is-override  no-lazyload\" title=\"YouTube player\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p><strong>Date : December 7, 2021, 16:00 CET<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p><strong><strong>Ben Freivogel<\/strong><\/strong> (U. of Amsterdam)<\/p>\n<\/div><\/div>\n\n\n\n<p><strong>Link:<\/strong>&nbsp;<a href=\"https:\/\/zoom.us\/j\/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09\">https:\/\/zoom.us\/j\/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09<\/a><\/p>\n\n\n\n<p><strong>Title:<\/strong> Computing Quantum Corrections to Black Holes in Semi-Classical Gravity<\/p>\n\n\n\n<p><strong>Abstract<\/strong>:&nbsp;Based mainly on&nbsp;<a href=\"https:\/\/arxiv.org\/abs\/2105.12771\">[arXiv:<\/a><a href=\"https:\/\/arxiv.org\/abs\/2105.12771\" target=\"_blank\" rel=\"noreferrer noopener\">2105.12771<\/a><a href=\"https:\/\/arxiv.org\/abs\/2105.12771\">]<\/a>.&nbsp;An important question about black holes is to what extent a typical pure state differs from the ensemble average. We show that this question can be answered within semi-classical gravity. We focus on the quantum deviation, which measures the fluctuations in the expectation value of an operator in an ensemble of pure states. For a large class of ensembles and observables, these fluctuations are calculated by a correlation function in the eternal black hole background, which can be reliably calculated within semi-classical gravity. This implements the idea of [<a href=\"https:\/\/arxiv.org\/abs\/2002.02971\" target=\"_blank\" rel=\"noreferrer noopener\">arXiv:2002.02971<\/a>] that wormholes can arise from averages over states rather than theories. As an application, we calculate the size of the long-time correlation function&nbsp;\u27e8A(t)A(0)\u27e9.<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Date : December 7, 2021, 16:00 CET Ben Freivogel (U. of Amsterdam) Link:&nbsp;https:\/\/zoom.us\/j\/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Title: Computing Quantum Corrections to Black Holes in Semi-Classical Gravity Abstract:&nbsp;Based mainly on&nbsp;[arXiv:2105.12771].&nbsp;An important question about black holes is to what extent a typical pure state differs from the ensemble average. We show that this question can be answered within semi-classical gravity. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-822202","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/posts\/822202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/comments?post=822202"}],"version-history":[{"count":2,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/posts\/822202\/revisions"}],"predecessor-version":[{"id":884942,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/posts\/822202\/revisions\/884942"}],"wp:attachment":[{"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/media?parent=822202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/categories?post=822202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/projects.ift.uam-csic.es\/holotube\/wp-json\/wp\/v2\/tags?post=822202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}