{"id":4597,"date":"2017-09-09T14:40:14","date_gmt":"2017-09-09T12:40:14","guid":{"rendered":"https:\/\/www.oa-cagliari.inaf.it\/seminari\/a-model-of-the-inflationary-universe-that-can-be-solved-exactly\/"},"modified":"2017-09-09T14:40:14","modified_gmt":"2017-09-09T12:40:14","slug":"a-model-of-the-inflationary-universe-that-can-be-solved-exactly","status":"publish","type":"seminari","link":"https:\/\/www.oa-cagliari.inaf.it\/en\/seminars\/a-model-of-the-inflationary-universe-that-can-be-solved-exactly\/","title":{"rendered":"A model of the inflationary universe that can be solved exactly"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2055\" src=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017051518323207768.jpg\" alt=\"\" width=\"500\" height=\"414\" srcset=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017051518323207768.jpg 500w, https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017051518323207768-300x248.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Inflationary models are currently the best attempt to describe the early stages of the Universe&#8217;s development and are based<br \/>\non the hypothesis that, immediately after the Big Bang, there was an accelerated expansion of the Universe. Among the many mechanisms that lead<br \/>\nto inflation, the most common is based on models of gravity minimally coupled to a scalar field moving along a particular<br \/>\npotential. I present such a model of the Universe that admits exact cosmological solutions describing an initially<br \/>\ninflationary behaviour evolving into a classical power-law expansion.<br \/>\nIn the figure: Graph of the expansion of the Universe with inflation.  <\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<p><span style=\"font-family: Times New Roman, serif;\"><em>Today, Astro Chiacchiere! <\/em>is <\/span><span style=\"font-family: Times New Roman, serif;\">an informal meeting among the staff of the Cagliari Astronomical Observatory (staff, postdocs, and students), aimed at discussing topics mainly of a scientific, technological, and informational nature about the Observatory&#8217;s activities. <\/span><span style=\"font-family: Times New Roman, serif;\">The meeting usually takes place on Tuesday<\/span><span style=\"font-family: Times New Roman, serif;\">s at 11:30 AM in the Auditorium of the Cagliari Astronomical Observatory. <\/span><span style=\"font-family: Times New Roman, serif;\">For information and\/or contributions, contact <\/span><span style=\"font-family: Times New Roman, serif;\"><em>vvacca@oa-cagliari.inaf.it <\/em><em>and<\/em> <\/span><span style=\"font-family: Times New Roman, serif;\"><em>surcis@oa-cagliari.inaf.it<\/em><\/span><\/p>\n","protected":false},"template":"","class_list":["post-4597","seminari","type-seminari","status-publish","hentry","categorie_seminari-astro-chiacchiere"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari\/4597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari"}],"about":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/types\/seminari"}],"wp:attachment":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/media?parent=4597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}