{"id":11540,"date":"2025-06-01T14:57:03","date_gmt":"2025-06-01T12:57:03","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=11540"},"modified":"2025-06-03T13:40:41","modified_gmt":"2025-06-03T11:40:41","slug":"transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\/","title":{"rendered":"Transport quantique dans les r\u00e9seaux optiques modul\u00e9s en temps. &#8211; (Julien H\u00e9braud \/ LPT \/ Th\u00e8se). &#8211; 10\/06\/2025, 14H"},"content":{"rendered":"<p><span style=\"font-size: 20px; background-color: #f18500;\">Soutenance de th\u00e8se<\/span><\/p>\n<p><strong><span style=\"font-size: 20px; color: #191970;\">Julien H\u00e9braud, <\/span><\/strong>LPT, Salle de conf\u00e9rence, Bat. 3R4<\/p>\n<p><strong>Composition du Jury<\/strong><\/p>\n<ul style=\"list-style-type: circle;\">\n<li>Bertrand GEORGEOT (Toulouse)<\/li>\n<li>Gabriel LEMARI\u00c9 (Singapour et Toulouse)<\/li>\n<li>Mathias ALBERT (Nice)<\/li>\n<li>Serguey SKIPETROV (Grenoble)<\/li>\n<li>Nathalie GUIHERY (Toulouse)<\/li>\n<li>Radu CHICIREANU (Lille)<\/li>\n<\/ul>\n<p><span style=\"font-size: 20px;\"><strong>R\u00e9sum\u00e9<\/strong> :<\/span><br \/>\nLa r\u00e9trodiffusion coh\u00e9rente (CBS) et la diffusion coh\u00e9rente vers l\u2019avant (CFS) sont des effets de coh\u00e9rence quantique qui r\u00e9sultent des interf\u00e9rences multiples d\u2019une onde en propagation dans un milieu d\u00e9sordonn\u00e9. Ce deuxi\u00e8me effet est un marqueur d\u2019une localisation, qui confine l\u2019onde dans une zone du milieu d\u00e9sordonn\u00e9, emp\u00eachant sa diffusion. Ce ph\u00e9nom\u00e8ne est connu sous le nom de localisation d\u2019Anderson en pr\u00e9sence d\u2019un d\u00e9sordre spatial, et de localisation dynamique en pr\u00e9sence d\u2019un d\u00e9sordre en impulsion. Le CBS et le CFS s\u2019observent sous forme de pics dans la densit\u00e9 de probabilit\u00e9 de l\u2019espace r\u00e9ciproque au d\u00e9sordre, dont la dynamique d\u00e9pend principalement des caract\u00e9ristiques de localisation du syst\u00e8me dans lequel les ondes se propagent. Si le CBS est bien connu et a \u00e9t\u00e9 observ\u00e9 avec des ondes de diff\u00e9rentes natures, le CFS, quant \u00e0 lui, n\u2019a \u00e9t\u00e9 d\u00e9couvert num\u00e9riquement que tr\u00e8s r\u00e9cemment.<\/p>\n<p>Plusieurs syst\u00e8mes pourraient permettre d\u2019observer ces effets de coh\u00e9rence quantique, mais l\u2019un des plus prometteurs \u00e0 ce jour est le Kicked Rotor. Ce syst\u00e8me pr\u00e9sente une dynamique caract\u00e9ris\u00e9e par une succession d\u2019impulsions instantan\u00e9es et de p\u00e9riodes d\u2019\u00e9volution libre. En r\u00e9gime quantique et pour certains jeux de param\u00e8tres, ce syst\u00e8me pr\u00e9sente un d\u00e9sordre effectif permettant l\u2019apparition des effets interf\u00e9rentiels et notamment la localisation dynamique. L\u2019\u00e9tude des sym\u00e9tries de renversement du temps et de parit\u00e9 au sein de ce syst\u00e8me a r\u00e9v\u00e9l\u00e9 une dynamique int\u00e9ressante, tout en donnant acc\u00e8s \u00e0 de meilleurs contrastes CBS et CFS. La sym\u00e9trie de renversement du temps est \u00e0 l\u2019origine de la pr\u00e9sence ou non du pic CBS. La sym\u00e9trie de parit\u00e9 est \u00e0 l\u2019origine des doublets en \u00e9nergie dans le spectre, induisant des dynamiques CBS et CFS remarquables.<\/p>\n<p>Suite \u00e0 une collaboration avec l\u2019\u00e9quipe exp\u00e9rimentale du LCAR \u00e0 Toulouse, nous avons adapt\u00e9 un mod\u00e8le de Kicked Rotor r\u00e9alisable par modulation de r\u00e9seaux optiques. Ce mod\u00e8le conserve les caract\u00e9ristiques de localisation et de dynamique du mod\u00e8le canonique, tout en permettant d\u2019ajuster les sym\u00e9tries. Finalement, nous rapportons dans ce manuscrit la premi\u00e8re observation directe du pic CFS, dans une exp\u00e9rience d\u2019atomes froids.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lieu : Salle de conf\u00e9rence, 3R4<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,308,313],"class_list":["post-11540","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-hdr-thesis","tribe_events_cat-lpt","cat_events","cat_hdr-thesis","cat_lpt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Transport quantique dans les r\u00e9seaux optiques modul\u00e9s en temps. - (Julien H\u00e9braud \/ LPT \/ Th\u00e8se). - 10\/06\/2025, 14H - FeRMI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Transport quantique dans les r\u00e9seaux optiques modul\u00e9s en temps. - (Julien H\u00e9braud \/ LPT \/ Th\u00e8se). - 10\/06\/2025, 14H - FeRMI\" \/>\n<meta property=\"og:description\" content=\"Lieu : Salle de conf\u00e9rence, 3R4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\/\" \/>\n<meta property=\"og:site_name\" content=\"FeRMI\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-03T11:40:41+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\\\/\",\"url\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\\\/\",\"name\":\"Transport quantique dans les r\u00e9seaux optiques modul\u00e9s en temps. - (Julien H\u00e9braud \\\/ LPT \\\/ Th\u00e8se). - 10\\\/06\\\/2025, 14H - FeRMI\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/#website\"},\"datePublished\":\"2025-06-01T12:57:03+00:00\",\"dateModified\":\"2025-06-03T11:40:41+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/transport-quantique-dans-les-reseaux-optiques-modules-en-temps-julien-hebraud-lpt-these-10-06-2025-14h\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Events\",\"item\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/events\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Transport quantique dans les r\u00e9seaux optiques modul\u00e9s en temps. &#8211; 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