{"id":681,"date":"2026-09-17T08:26:53","date_gmt":"2026-09-17T11:26:53","guid":{"rendered":"https:\/\/www.ccen.ufpb.br\/ppgf\/?p=681"},"modified":"2026-09-17T11:11:57","modified_gmt":"2026-09-17T14:11:57","slug":"__trashed","status":"publish","type":"post","link":"https:\/\/www.ccen.ufpb.br\/ppgf\/ciclo-de-coloquios\/__trashed\/","title":{"rendered":"Col\u00f3quio: Nonlocal field theory: Classical and quantum aspects"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"303\" src=\"http:\/\/www.ccen.ufpb.br\/ppgf\/wp-content\/uploads\/sites\/115\/sites\/445\/2026\/09\/WhatsApp-Image-2026-09-10-at-19.39.29-1-4-e1789653811762.jpeg\" alt=\"\" class=\"wp-image-707\" style=\"aspect-ratio:0.9922064862146988;width:272px;height:auto\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Ciclo de Col\u00f3quios 2026.2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Col\u00f3quio #03<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cNonlocal field theory: Classical and quantum aspects\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prof. Dr. &nbsp;Paulo Porf\u00edrio<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sexta-feira, 18 de setembro de 2026, \u00e0s 14h, no Audit\u00f3rio 2 do Pr\u00e9dio da P\u00f3s-Gradua\u00e7\u00e3o em F\u00edsica\/CCEN.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Resumo: In this talk, we address nonlocal field theories, in which the nonlocality arises through infinite-derivative operators, $f(\\Box)$, called form factor, in their actions. We review the motivations for introducing such theories in different contexts; for example, nonlocal form factors naturally arise in the low-energy limits of string\/M-theory. In particular, we propose a nonlocal spin-1\/2 field theory, where the nonlocal form factors $f(\\Box)$ still leave room for more generic form factors, $f(\\slashed{\\partial})$, based on the Dirac operator. Finally, we present our results for this nonlocal fermionic theory.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ciclo de Col\u00f3quios 2026.2 Col\u00f3quio #03 \u201cNonlocal field theory: Classical and quantum aspects\u201d Prof. Dr. [&hellip;]<\/p>\n","protected":false},"author":682,"featured_media":707,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-681","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciclo-de-coloquios"],"_links":{"self":[{"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/posts\/681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/users\/682"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/comments?post=681"}],"version-history":[{"count":20,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/posts\/681\/revisions"}],"predecessor-version":[{"id":716,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/posts\/681\/revisions\/716"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/media\/707"}],"wp:attachment":[{"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/media?parent=681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/categories?post=681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ccen.ufpb.br\/ppgf\/wp-json\/wp\/v2\/tags?post=681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}