{"id":11732,"date":"2025-10-28T15:37:44","date_gmt":"2025-10-28T14:37:44","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=11732"},"modified":"2025-10-30T10:19:26","modified_gmt":"2025-10-30T09:19:26","slug":"reseaux-de-tenseurs-pour-la-resolution-dedp-multi-echelles-jheng-wei-li-lpt-seminar-4-11-2025-14h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/reseaux-de-tenseurs-pour-la-resolution-dedp-multi-echelles-jheng-wei-li-lpt-seminar-4-11-2025-14h\/","title":{"rendered":"R\u00e9seaux de tenseurs pour la r\u00e9solution d\u2019EDP multi-\u00e9chelles. -(Jheng-Wei Li \/ LPT \/ Seminar). &#8211; 4\/11\/2025, 14H"},"content":{"rendered":"<p><span style=\"font-size: 20px; background-color: #f18500;\">S\u00e9minaire LPT<\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Jheng-Wei Li <\/strong><\/span>(CEA)<\/span><\/p>\n<p><span style=\"background-color: #cecece;\">Seminar LPT, 4\/11\/2025, 14H, 3R4, salle de conf\u00e9rence<\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Summary<\/strong><\/span><\/p>\n<p>Many problems in science and engineering are described by partial differential equations (PDEs). Examples range from neutron diffusion in nuclear reactors to electron motion on superlattices. These equations are hard to solve in practice because they involve many different length scales that render conventional discretization approaches prohibitively costly.<\/p>\n<p>In this talk, I will show how ideas from many-body physics, in particular tensor networks, can overcome this difficulty. Tensor networks are clever ways of compressing large, structured data without losing essential information. Originally invented to describe quantum many-body wavefunctions, they can also be adapted to PDEs. I will use two simple, instructive examples to illustrate how to accomplish this.<\/p>\n<p>The key message is that \u00ab exponentially many \u00bb variables do not necessarily imply \u00ab exponentially hard \u00bb computations. By bridging concepts from many-body physics and functions of continuous variables, tensor networks give a promising pathway toward a scalable approach for multi-scale PDEs and beyond.<\/p>\n<hr>\n<div class=\"leaflet-map WPLeafletMap\" style=\"height:300px; width:70%;\"><\/div><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMapShortcode() {\/*<script>*\/\nvar baseUrl = atob('aHR0cHM6Ly97c30udGlsZS5vcGVuc3RyZWV0bWFwLm9yZy97en0ve3h9L3t5fS5wbmc=');\nvar base = (!baseUrl && window.MQ) ?\n    window.MQ.mapLayer() : L.tileLayer(baseUrl,\n        L.Util.extend({}, {\n            detectRetina: 0,\n        },\n        {\"subdomains\":\"abc\",\"noWrap\":false,\"maxZoom\":18}        )\n    );\n    var options = L.Util.extend({}, {\n        layers: [base],\n        attributionControl: false\n    },\n    {\"zoomControl\":true,\"scrollWheelZoom\":true,\"doubleClickZoom\":true,\"fitBounds\":true,\"minZoom\":9,\"maxZoom\":18,\"maxBounds\":null,\"attribution\":\"<a href=\\\"http:\\\/\\\/leafletjs.com\\\" title=\\\"Une biblioth\\u00e8que JS pour des cartes interactives\\\">Leaflet<\\\/a>; \\u00a9 <a href=\\\"http:\\\/\\\/www.openstreetmap.org\\\/copyright\\\">OpenStreetMap<\\\/a> contributeurs\"},\n    {});\nwindow.WPLeafletMapPlugin.createMap(options).setView([43.560830727361,1.4672373725804],16);window.WPLeafletMapPlugin.createScale({});});<\/script>\n<p><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMarkerShortcode() {\/*<script>*\/\nvar map = window.WPLeafletMapPlugin.getCurrentMap();\nvar group = window.WPLeafletMapPlugin.getCurrentGroup();\nvar marker_options = window.WPLeafletMapPlugin.getIconOptions({});\nvar marker = L.marker(\n    [0,0],\n    marker_options\n);\nvar is_image = map.is_image_map;\n    marker.setLatLng( map.getCenter() );\nif (marker_options.draggable) {\n    marker.on('dragend', function () {\n        var latlng = this.getLatLng();\n        var lat = latlng.lat;\n        var lng = latlng.lng;\n        if (is_image) {\n            console.log('leaflet-marker y=' + lat + ' x=' + lng);\n        } else {\n            console.log('leaflet-marker lat=' + lat + ' lng=' + lng);\n        }\n    });\n}\nmarker.addTo( group );\nmarker.bindPopup(window.WPLeafletMapPlugin.unescape('Salle de conf\u00e9rence (- B\u00e2timent 3R4)'));window.WPLeafletMapPlugin.markers.push( marker );\n        });<\/script><br \/>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lieu : Salle de conf\u00e9rence, B\u00e2timent 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":[48,313,233],"class_list":["post-11732","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-lpt","tribe_events_cat-seminars","cat_events","cat_lpt","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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