{"id":12149,"date":"2014-08-17T10:25:34","date_gmt":"2014-08-17T17:25:34","guid":{"rendered":"http:\/\/www.preposterousuniverse.com\/blog\/?p=12149"},"modified":"2014-08-17T10:25:34","modified_gmt":"2014-08-17T17:25:34","slug":"single-superfield-inflation-the-trailer","status":"publish","type":"post","link":"https:\/\/preposterousuniverse.com\/blog\/2014\/08\/17\/single-superfield-inflation-the-trailer\/","title":{"rendered":"Single Superfield Inflation: The Trailer"},"content":{"rendered":"<p>This is amazing. (Via <a href=\"https:\/\/twitter.com\/mcnees\">Bob McNees<\/a> and <a href=\"https:\/\/twitter.com\/michael_nielsen\">Michael Nielsen<\/a> on Twitter.)<\/p>\n<div class=\"lyte-wrapper\" title=\"Single Superfield Inflation\" style=\"width:640px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_Pdp659BBR3Q\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/Pdp659BBR3Q\/hqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/Pdp659BBR3Q\" \/><meta itemprop=\"duration\" content=\"PT1M5S\" \/><meta itemprop=\"uploadDate\" content=\"2014-08-18T00:26:52Z\" \/><\/div><div id=\"lyte_Pdp659BBR3Q\" data-src=\"https:\/\/i.ytimg.com\/vi\/Pdp659BBR3Q\/hqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">Single Superfield Inflation<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/Pdp659BBR3Q\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/Pdp659BBR3Q\/0.jpg\" alt=\"Single Superfield Inflation\" width=\"640\" height=\"340\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"Movie of research on &quot;Single Superfield Inflation&quot;. Sergei V. Ketov and Takahiro Terada Inflation in Supergravity with a Single Chiral Superfield Phys.Lett. B736 (2014) 272-277 http:\/\/arxiv.org\/abs\/1406.0252 Credit of the image of the universe: NASA\/WMAP Science Team Images of academic papers were taken from arXiv: Kawasaki, Yamaguchi, Yanagida http:\/\/arxiv.org\/abs\/hep-ph\/0004243 Kallosh, Linde http:\/\/arxiv.org\/abs\/1008.3375 Ferrara, Linde, Kallosh, Porrati http:\/\/arxiv.org\/abs\/1307.7696 as well as our paper.\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:640px;margin:5px;\"><\/div><\/p>\n<p>Backstory for the puzzled: here is a nice paper that came out last month, on <a href=\"http:\/\/en.wikipedia.org\/wiki\/Inflation_(cosmology)\">inflation<\/a> in <a href=\"http:\/\/en.wikipedia.org\/wiki\/Supergravity\">supergravity<\/a>. <\/p>\n<blockquote><p><strong><a href=\"http:\/\/arxiv.org\/abs\/1406.0252\">Inflation in Supergravity with a Single Chiral Superfield<\/a><\/strong><br \/>\nSergei V. Ketov, Takahiro Terada<\/p>\n<p>We propose new supergravity models describing chaotic Linde- and Starobinsky-like inflation in terms of a single chiral superfield. The key ideas to obtain a positive vacuum energy during large field inflation are (i) stabilization of the real or imaginary partner of the inflaton by modifying a Kahler potential, and (ii) use of the crossing terms in the scalar potential originating from a polynomial superpotential. Our inflationary models are constructed by starting from the minimal Kahler potential with a shift symmetry, and are extended to the no-scale case. Our methods can be applied to more general inflationary models in supergravity with only one chiral superfield.<\/p><\/blockquote>\n<p>Supergravity is simply the supersymmetric version of Einstein&#8217;s general theory of relativity, but unlike GR (where you can consider just about any old collection of fields to be the &#8220;source&#8221; of gravity), the constraints of supersymmetry place quite specific requirements on what counts as the &#8220;stuff&#8221; that creates the gravity. In particular, the allowed stuff comes in the form of &#8220;<a href=\"http:\/\/en.wikipedia.org\/wiki\/Superfield\">superfields<\/a>,&#8221; which are combinations of boson and fermion fields. So if you want to have inflation within supergravity (which is a very natural thing to want), you have to do a bit of exploring around within the allowed set of superfields to get everything to work. <a href=\"http:\/\/arxiv.org\/abs\/1008.3375\">Renata Kallosh and Andrei Linde<\/a>, for example, have been examining this problem for quite some time.<\/p>\n<p>What Ketov and Terada have managed to do is boil the necessary ingredients down to a minimal amount: just a single superfield. Very nice, and worth celebrating. So why not make a movie-like trailer to help generate a bit of buzz?<\/p>\n<p>Which is just what <a href=\"https:\/\/twitter.com\/TakahiroTerada\">Takahiro Terada<\/a>, a PhD student at the University of Tokyo, has done. The link to the YouTube video appeared in <a href=\"http:\/\/arxiv.org\/abs\/1406.0252\">an unobtrusive comment<\/a> in the arxiv page for the revised version of their paper. iMovie provides a template for making such trailers, so it can&#8217;t be all that hard to do &#8212; but (1) nobody else does it, so, genius, and (2) it&#8217;s a pretty awesome job, with just the right touch of humor. <\/p>\n<p>I wouldn&#8217;t have paid nearly as much attention to the paper without the trailer, so: mission accomplished. Let&#8217;s see if we can&#8217;t make this a trend.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is amazing. (Via Bob McNees and Michael Nielsen on Twitter.) Backstory for the puzzled: here is a nice paper that came out last month, on inflation in supergravity. Inflation in Supergravity with a Single Chiral Superfield Sergei V. Ketov, Takahiro Terada We propose new supergravity models describing chaotic Linde- and Starobinsky-like inflation in terms [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,18,28],"tags":[],"class_list":["post-12149","post","type-post","status-publish","format-standard","hentry","category-arxiv","category-humor","category-science"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/12149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/comments?post=12149"}],"version-history":[{"count":2,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/12149\/revisions"}],"predecessor-version":[{"id":12151,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/12149\/revisions\/12151"}],"wp:attachment":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/media?parent=12149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/categories?post=12149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/tags?post=12149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}