{"id":4307,"date":"2018-05-14T10:15:00","date_gmt":"2018-05-14T17:15:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/physicist-investigates-black-holes-like-crime-scenes\/"},"modified":"2023-04-19T11:08:11","modified_gmt":"2023-04-19T18:08:11","slug":"stephen-hawking-radiation-warner-erc-grant","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/stephen-hawking-radiation-warner-erc-grant\/","title":{"rendered":"Physicist investigates black holes like crime scenes"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n          \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img\n                            data-src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-2806-768x432.jpg\"\n          data-srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-2806-768x432.jpg 768w\"          data-sizes=\"(min-width:1200px) 75vw, (min-width:768px) 83vw, 100vw\"          class=\"lazyload\"\n        \n                  alt=\"Physicist investigates black holes like crime scenes\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n  \n      <div class=\"image-caption\">\n          \n<div class=\"f--field f--description\">\n\n    \n  Black holes have capture the imaginations of scientists and the public alike. Physicist Nicholas Warner aims to resolve one of their most enigmatic mysteries.\n\n\n<\/div>\n    <\/div>\n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>Physicist investigates black holes like crime scenes<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  USC Dornsife Professor Nick Warner tackles one of the most intractable problems in physics, attempting to solve a paradox identified with his late friend cosmologist Stephen Hawking.\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Katharine Gammon<\/a><\/strong>\n    \n          <span class=\"post-date-field\">May 14, 2018<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" href=\"\/#copy_link\" rel=\"nofollow noopener\" title=\"Link\">\n            <span class=\"a2a_svg a2a_s__default a2a_s_copy_link\">\n              <svg height=\"19\" viewBox=\"0 0 19 19\" width=\"19\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m7.43475275 9.52380952-2.17490843 2.26076008c-1.08745421 1.058837-1.68841575 2.518315-1.68841575 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xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m8.14285714 9.42857143c-.17142857 0-.34285714 0-.51428571.08571428l7.28571427 6.34285719c.3428572.2571428.6857143.2571428.9428572 0l7.2857142-6.34285719c-.0857142-.08571428-.2571428-.08571428-.4285714-.08571428zm-1.28571428 1.11428567v.1714286 8.5714286c0 .6857143.6 1.2857143 1.28571428 1.2857143h14.57142856c.6857143 0 1.2857143-.6 1.2857143-1.2857143v-8.5714286c0-.0857143 0-.0857143 0-.1714286l-7.2 6.3428572c-.7714286.6857143-1.8857143.6857143-2.6571429 0z\" fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Nicholas Warner wants to figure out how matter behaves at the most extreme frontier of the universe. <a href=\"https:\/\/dornsife.usc.edu\/cf\/faculty-and-staff\/faculty.cfm?pid=1003810\" target=\"_blank\">Warner<\/a>, professor of physics and astronomy and mathematics at USC Dornsife, recently received a prestigious <a href=\"https:\/\/www.eurekalert.org\/pub_releases\/2018-04\/erc-erc040518.php\" target=\"_blank\">grant<\/a> from the <a href=\"https:\/\/erc.europa.eu\/\" target=\"_blank\">European Research Council<\/a> to study a problem first revealed by Stephen Hawking &mdash; the black hole information paradox.<\/p>\n<p>So what exactly is this paradox?<\/p>\n<p>Black holes are defined by their immense gravitational fields &mdash; fields that are powerful enough to trap light as well as matter. This matter carries information, such as its composition, mass and position. Since black holes collapse upon themselves, everything gets so compressed that modern understandings of physics also collapse.<\/p>\n<p>&ldquo;The simplest way to describe it,&rdquo; says Warner, &ldquo;is that one of the properties of black holes is that once stuff is inside them, they are featureless from the outside. So when you make a black hole, you&rsquo;ve essentially erased from the outside any information about how you made it.&rdquo;<\/p>\n<p>According to the current laws of physics, this information must always be conserved, even when trapped in these black holes. In the 1980s, Stephen Hawking realized, however, that because black holes have a temperature, they must evaporate over time through a process known as Hawking radiation. This process would destroy the information that the black hole conserved. This discrepancy is called the <a href=\"https:\/\/www.quantamagazine.org\/stephen-hawkings-black-hole-paradox-keeps-physicists-puzzled-20180314\/\" target=\"_blank\">black hole information paradox<\/a>.<\/p>\n<p>Warner likens the problem to forensic science &mdash; trying to reconstruct a crime scene from blood spatters and fingerprints. &nbsp;The formation and evaporation of a black hole erases everything from the crime scene, but this is forbidden by quantum mechanics. This problem has been around for about 40 years, and Warner started working on it in 2007: He uses <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/2189\/the-universe-as-we-know-it\/\" target=\"_blank\">string theory<\/a> to uncover the hidden quantum structure of black holes.<\/p>\n<p><strong>Stop at the horizon<\/strong><\/p>\n<p>Now, the new five-year ERC Advanced grant will allow Warner to work at the Institut de Physique Th&eacute;orique near Paris, puzzling over the quantum structure of black holes and the recovery of information. Starting in January 2019, he&rsquo;ll spend three of the next five years in France, with the other years at USC Dornsife.<\/p>\n<p>Warner acknowledges how supportive USC has been of his work &mdash; both in California and in Europe. &ldquo;I view the fact that I can go and do this thing as yet another manifestation of the very strong support they&rsquo;ve given me,&rdquo; he says.<\/p>\n<div class=\"news-image-portrait news-image-right\"><img loading=\"lazy\" decoding=\"async\" src=\"\/wp-content\/uploads\/sites\/7\/migration-uploads\/NICK_WARNER_PZZ_225x350_2-2806.jpg\" alt=\"Portrait of Nicholas Warner\" width=\"225\" height=\"350\"><\/p>\n<p>Physicist Nicholas Warner. Photo by Peter Zhaoyu Zhou.<\/p>\n<\/div>\n<p>The goal of his project is to explore microstate geometries, which are identical to black holes in their properties, except that microstate geometries do not have a horizon (the boundary at which light can no longer escape the black hole&rsquo;s gravitational effects). Instead, microstate geometries use string theory and field theory and stop the inevitable collapse of the black hole at the horizon, conserving the information stored in the black hole. Warner intends to study how the trapped matter and radiation transforms into microstate geometries and is re-emitted from the black hole&rsquo;s surface.<\/p>\n<p>Other physicists are working on different parts of the black hole information paradox, using different approaches. Warner says it feels a bit like the old parable of the blind men and the elephant. In the story, six blind men stand next to an elephant, trying to discern what they are touching. One touches the side and says it&rsquo;s a wall; another touches the animal&rsquo;s trunk and says it&rsquo;s a leg. &nbsp;<\/p>\n<p>&ldquo;Everyone has a piece of the thing, and they extrapolate based on what they can detect and analyze,&rdquo; says Warner. That&rsquo;s not unlike the various approaches to solving the black hole information paradox. &ldquo;The other people working on this are really smart, but I think we have a huge chunk of the puzzle in our approach,&rdquo; he says.<\/p>\n<p><strong>Hawking: friend and mentor<\/strong><\/p>\n<p>Hawking, the renowned theoretical physicist, was Warner&rsquo;s thesis adviser at the University of Cambridge, where Warner earned his Ph.D. in physics and mathematics in 1982. The two men remained in touch through the years, and Warner was one of 500 people who attended <a href=\"http:\/\/www.latimes.com\/local\/obituaries\/la-me-stephen-hawking-20180313-story.html\">Hawking&rsquo;s funeral<\/a> on March 31. He has also been invited to the public memorial and interment on June 15 in Westminster Abbey, where Hawking will be buried next to Isaac Newton and Charles Darwin.<\/p>\n<p>As he looked around the room during the funeral, Warner had a realization. &ldquo;Basically every scientist there is in some way working on this particular problem, in one form or another, that Stephen put out there in 1980.<\/p>\n<p>&ldquo;It is deeply challenging,&rdquo; says Warner. &ldquo;I think that is his greatest legacy, that he discovered this issue and we are still trying to figure it out.&rdquo;<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>USC Dornsife Professor Nick Warner tackles one of the most intractable problems in physics, attempting to solve a paradox identified with his late friend cosmologist Stephen Hawking.<\/p>\n","protected":false},"author":0,"featured_media":4310,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[435,216],"class_list":["post-4307","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","tag-nicholas-warner","tag-physics-and-astronomy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Physicist investigates black holes like crime scenes<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dornsife.usc.edu\/news\/stories\/stephen-hawking-radiation-warner-erc-grant\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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