{"id":107687,"date":"2018-03-11T10:32:11","date_gmt":"2018-03-11T10:32:11","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/on-flrw-cosmologies-in-non-standard-gravity\/"},"modified":"2018-03-11T10:32:11","modified_gmt":"2018-03-11T10:32:11","slug":"on-flrw-cosmologies-in-non-standard-gravity","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/barcelona\/on-flrw-cosmologies-in-non-standard-gravity\/","title":{"rendered":"On flrw cosmologies in non-standard gravity"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Diego S\u00e1ez G\u00f3mez <\/strong><\/h2>\n<p>El proyecto de tesis esta enfocado en el estudio de la evoluci'{o}n del universo y m\u00e1s concretamente en la explicaci\u00f3n del mecanismo que produce su actual expansi\u00f3n acelerada, y que probablemente sea el mismo que ha condicionado las distintas \u00e9pocas de la historia del universo, y que a su vez produjo la inflaci\u00f3n. Partiendo de esta base, se trata de investigar  a partir de teor\u00edas escalar-tensor y modificaciones de la relatividad general dicho mecanismo, y obtener nuevos efectos derivados de estas modificaciones que puedan ser contrastados con las medidas experimentales. Para ello se han construido modelos con la inclusi\u00f3n de campos escalares  acoplados tanto d\u00e9bilmente como con  acoplo fuerte , y por otro lado se han considerado modificaciones de la propia relatividad general a trav\u00e9s de cambios en la dependencia de la acci\u00f3n de hilbert-einstein con respecto al escalar de ricci, construyendo teor\u00edas alternativas cuya acci\u00f3n dependa de una funci\u00f3n del escalar de riccio y\/o el invariante de gauss-bonnet, lo que se conoce como teor\u00edas f(r) y\/o f(g). Por tanto, todo ello busca como objetivo la explicaci\u00f3n de los resultados obtenidos a trav\u00e9s de las observaciones. Adem\u00e1s tambi\u00e9n se estudian las  caracter\u00edsticas y aspectos de la teor\u00eda de horava-lifshitz, que dice ser renormalizable, pero de la que a\u00fan sigue habiendo muchas cuestiones abiertas. Otros aspectos que tiene que ver con las m\u00e9tricas flrw, como las singularidades son analizados..<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>On flrw cosmologies in non-standard gravity<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 On flrw cosmologies in non-standard gravity <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Diego S\u00e1ez G\u00f3mez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 31\/03\/2011<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Emilio Elizalde Rius<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: joan Sol\u00e1 peracaula <\/li>\n<li>Antonio L\u00f3pez maroto (vocal)<\/li>\n<li>  (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Diego S\u00e1ez G\u00f3mez El proyecto de tesis esta enfocado en el estudio de la evoluci'{o}n del universo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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