{"id":75383,"date":"2005-05-07T00:00:00","date_gmt":"2005-05-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/correcciones-cuanticas-de-agujeros-negros-y-cosmologa%c2%ada\/"},"modified":"2005-05-07T00:00:00","modified_gmt":"2005-05-07T00:00:00","slug":"correcciones-cuanticas-de-agujeros-negros-y-cosmologa%c2%ada","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/correcciones-cuanticas-de-agujeros-negros-y-cosmologa%c2%ada\/","title":{"rendered":"Correcciones cu\u00e1nticas de agujeros negros y cosmolog\u00eda"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Gonzalo Olmo Alba <\/strong><\/h2>\n<p>En esta tesis se analizan dos de las predicciones fundamentales de la teor\u00eda de la gravitaci\u00f3n de einstein: los agujeros negros y la expansi\u00f3n cosmol\u00f3gica.  por una parte, se introduce una formulaci\u00f3n nueva para analizar procesos de radiaci\u00f3n cu\u00e1ntica en espacios curvos y se aplica al estudio de la radiaci\u00f3n hawking responsable de la evaporaci\u00f3n de los agujeros negros. La nueva formulaci\u00f3n es alternativa al formalismo estandar de coeficientes de bogolubov y se basa en el uso de las funciones de correlaci\u00f3n de los campos de materia. este m\u00e9todo se muestra ventajoso  frente a la t\u00e9cnica estandar en muchas aplicaciones de inter\u00e9s. En particular, se aclara una tensi\u00f3n aparente entre la producci\u00f3n de part\u00edculas y la emisi\u00f3n de flujos de energ\u00eda originada por las dificultades t\u00e9cnicas del formalismo  de coeficientes de bogolubov.  por otra parte, se analiza una familia de teor\u00edas de gravedad alternativas consideradas como una posible justificaci\u00f3n del fen\u00f3meno de expansi\u00f3n c\u00f3smica acelerada. Este fen\u00f3meno se desprende de recientes observaciones de la luminosidad de supernovas de tipo \u00ab1-a\u00bb. Las mencionadas teor\u00edas consisten en modificaciones del lagrangiano de hilbert-einstein, que se generaliza a una funci\u00f3n nojlineal de la curvatura escalar. Se analizan las dos formulaciones posibles de estas teor\u00edas, formalismo m\u00e9trico y formalismo de palatini, desde un punto de vista de teor\u00edas escalar-tensor y se investigan las ligaduras observacionales sobre el lagrangiano impuestas por experimentos de laboratorio y observaciones en el sistema solar. El an\u00e1lisis concluye que los posibles t\u00e9rminos no lineales de la curvatura est\u00e1n acotados por un plinomio cuadr\u00e1tico en la curvatura escalar. Este resultado descarta posibles t\u00e9rminos que crecen a bajas curvaturas est\u00e1n acotados por un polinomio cuadr\u00e1tico en la curvatura escalar. Este resultado descarta posibles t\u00e9rminos que crecen a bajas curvaturas y rebate, de este mo<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Correcciones cu\u00e1nticas de agujeros negros y cosmolog\u00eda<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Correcciones cu\u00e1nticas de agujeros negros y cosmolog\u00eda <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Gonzalo Olmo Alba <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Universitat de val\u00e9ncia (estudi general)<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/07\/2005<\/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>Jose Navarro Salas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  De azcarraga  feliu Jos\u00e9 adolfo <\/li>\n<li> Iba\u00f1ez cabanell Jos\u00e9 Mar\u00eda (vocal)<\/li>\n<li>roberto Balbinot (vocal)<\/li>\n<li>alessandro Fabbri (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gonzalo Olmo Alba En esta tesis se analizan dos de las predicciones fundamentales de la teor\u00eda de [&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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