{"id":61990,"date":"2018-03-09T22:49:51","date_gmt":"2018-03-09T22:49:51","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/quantum-information-in-infinite-dimensional-hilbert-spaces\/"},"modified":"2018-03-09T22:49:51","modified_gmt":"2018-03-09T22:49:51","slug":"quantum-information-in-infinite-dimensional-hilbert-spaces","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/barcelona\/quantum-information-in-infinite-dimensional-hilbert-spaces\/","title":{"rendered":"Quantum information in infinite dimensional hilbert spaces"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Miguel Navascu\u00e9s Cobo <\/strong><\/h2>\n<p>Esta tesis estudia las posibilidades y limitaciones que ofrecen los sistemas cu\u00e1nticos de dimensi\u00f3n infinita en el terreno de la informaci\u00f3n cu\u00e1ntica. En ella, se analiza el problema de la tomograf\u00eda en protocolos de criptograf\u00eda cu\u00e1ntica en sistemas de variables continuas, y se demuestra que, en cualquier an\u00e1lisis de seguridad, basta con que las dos partes  honestas consideren ataques de tipo gaussiano. En el \u00e1mbito de estimaci\u00f3n de estados gaussianos distribuidos de acuerdo a una densidad de probabilidad gaussiana, se proporciona una cota superior a la fidelidad m\u00e1xima, cota que suele ser \u00f3ptima, y se prueba que, en un gran conjunto de casos, la mejor estrategia hace uso de operaciones gaussianas. Finalmente, la tesis describe una caracterizaci\u00f3n \u00fatil del conjunto de todas las correlaciones compatibles con la mec\u00e1nica cu\u00e1ntica. Esta caracterizaci\u00f3n permite, por ejeplo, dar un m\u00e9todo sistem\u00e1tico para obtener la m\u00e1xima violaci\u00f3n compatible con la mec\u00e1nica cu\u00e1ntica de una desigualdad de bell lineal arbitraria.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Quantum information in infinite dimensional hilbert spaces<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Quantum information in infinite dimensional hilbert spaces <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Miguel Navascu\u00e9s Cobo <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 14\/12\/2007<\/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>Antonio Ac\u00edn<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: nicol\u00e1s Cerf <\/li>\n<li>g\u00e9za Giboke (vocal)<\/li>\n<li>anna Sanpera (vocal)<\/li>\n<li>Miguel \u00e1ngel Mart\u00edn-delgado (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Miguel Navascu\u00e9s Cobo Esta tesis estudia las posibilidades y limitaciones que ofrecen los sistemas cu\u00e1nticos de dimensi\u00f3n [&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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