{"id":4782,"date":"2025-03-09T07:25:56","date_gmt":"2025-03-09T07:25:56","guid":{"rendered":"https:\/\/quantum2025.org\/news-link\/que-signifie-quantique\/"},"modified":"2025-06-09T14:18:57","modified_gmt":"2025-06-09T14:18:57","slug":"que-signifie-quantique","status":"publish","type":"news-link","link":"https:\/\/quantum2025.org\/fr\/news-link\/que-signifie-quantique\/","title":{"rendered":"Que signifie \u00ab quantique \u00bb ?"},"content":{"rendered":"\n<p><\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-stretch is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\"><strong>2025 est l&rsquo;Ann\u00e9e internationale des sciences et technologies quantiques. Commen\u00e7ons par nous demander ce que signifie le mot \u00ab quantique \u00bb. <\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>C&rsquo;est une bonne question de d\u00e9part. En g\u00e9n\u00e9ral, le mot \u00ab quantum \u00bb signifie \u00ab quelque chose que l&rsquo;on peut compter \u00bb. Il provient d&rsquo;un mot latin et a la m\u00eame racine que des mots comme \u00ab quantit\u00e9 \u00bb et \u00ab quantifier \u00bb. Un \u00ab quantum \u00bb est une chose unique que l&rsquo;on peut compter et les \u00ab quanta \u00bb pluriels sont des choses que l&rsquo;on peut compter. La question est la suivante : lorsqu&rsquo;on regarde quelque chose, est-il possible de le compter ?    <\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69db8d09d7c81&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69db8d09d7c81\" class=\"aligncenter size-large is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"984\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/123-1024x984.png\" alt=\"\" class=\"wp-image-4664 lazyload\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/984;width:400px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/123-1024x984.png 1024w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/123-300x288.png 300w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/123-768x738.png 768w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/123.png 1075w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><\/div>\n<\/div>\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading has-text-align-left\"><strong>Pouvez-vous donner un exemple ?<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>Bien s\u00fbr. Si nous regardions la foule d&rsquo;un stade et que je disais \u00ab comptez la foule \u00bb, comment comprendriez-vous cette demande ? <\/p>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img decoding=\"async\" width=\"452\" height=\"631\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681 lazyload\" style=\"--smush-placeholder-width: 452px; --smush-placeholder-aspect-ratio: 452\/631;width:58px;height:auto\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" data-sizes=\"(max-width: 452px) 100vw, 452px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\"><strong>Je suppose que vous voulez dire compter les personnes dans la foule.<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>C&rsquo;est tout \u00e0 fait exact. Dans ce cas, les quanta &#8211; les choses que vous comptez &#8211; seraient des personnes. De m\u00eame, si nous regardions une plage et que je disais \u00ab comptez le sable \u00bb, que penseriez-vous que je veux dire ?  <\/p>\n<\/div>\n<\/div>\n\n<p><\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_people.png\"><img decoding=\"async\" width=\"770\" height=\"812\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_people.png\" alt=\"\" class=\"wp-image-4677 lazyload\" style=\"--smush-placeholder-width: 770px; --smush-placeholder-aspect-ratio: 770\/812;width:300px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_people.png 770w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_people-284x300.png 284w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_people-768x810.png 768w\" data-sizes=\"(max-width: 770px) 100vw, 770px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><\/figure>\n<\/div>\n<p><\/p>\n\n<p><\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-stretch is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading has-text-align-left\"><strong> Je pense que vous voulez dire compter les grains de sable, mais cela semble tr\u00e8s difficile !<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>Ce serait le cas ! La question n&rsquo;est pas de savoir si nous pouvons r\u00e9ellement trouver le nombre, mais s&rsquo;il existe quelque chose que nous pouvons compter. Dans ce cas, un quantum de sable est un grain de sable. Mais permettez-moi de poser une question plus d\u00e9licate : si nous \u00e9tions sur la plage, que nous regardions l&rsquo;eau et que je dise \u00ab comptez l&rsquo;eau \u00bb, qu&rsquo;est-ce que je veux dire ?   <\/p>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-stretch is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\"><strong>Peut-\u00eatre combien de litres d&rsquo;eau ?<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>C&rsquo;est une demande moins claire, n&rsquo;est-ce pas ? Dans le cas des litres, nous pouvons toujours d\u00e9velopper une unit\u00e9 de mesure convenue comme celle-ci pour compter les choses. Lorsque j&rsquo;ai demand\u00e9 de compter le sable, vous auriez pu l&rsquo;interpr\u00e9ter comme le nombre de litres de sable ou de kilogrammes de sable. Mais ces unit\u00e9s de mesure sont un peu arbitraires : au lieu de litres ou de kilogrammes, on pourrait compter en gallons, en livres ou en tonnes. Il s&rsquo;agit de conventions convenues qui pourraient \u00eatre modifi\u00e9es. Un quantum signifie quelque chose de moins arbitraire, une chose indivisible \u00e0 compter qui ne d\u00e9pendrait pas d&rsquo;un \u00e9talon de mesure arbitraire.     <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water.png\"><img decoding=\"async\" width=\"1024\" height=\"355\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water-1024x355.png\" alt=\"\" class=\"wp-image-4704 lazyload\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water-1024x355.png 1024w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water-300x104.png 300w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water-768x266.png 768w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water-1536x533.png 1536w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/counting_water.png 1807w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/355;\" \/><\/a><\/figure>\n<\/div><\/div>\n<\/div>\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img decoding=\"async\" width=\"452\" height=\"631\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681 lazyload\" style=\"--smush-placeholder-width: 452px; --smush-placeholder-aspect-ratio: 452\/631;width:58px;height:auto\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" data-sizes=\"(max-width: 452px) 100vw, 452px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading has-text-align-left\"><strong>Alors, pour compter l&rsquo;eau, voulez-vous dire compter les mol\u00e9cules d&rsquo;eau ?<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>Oui, une mol\u00e9cule d&rsquo;eau serait un quantum d&rsquo;eau plus appropri\u00e9. C&rsquo;est la plus petite unit\u00e9 d&rsquo;eau indivisible que l&rsquo;on puisse avoir. Bien s\u00fbr, il serait encore plus difficile de compter les mol\u00e9cules d&rsquo;eau que les grains de sable.  <\/p>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-stretch is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\"><strong>On ne peut m\u00eame pas voir les mol\u00e9cules d&rsquo;eau pour les compter !<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>Pr\u00e9cis\u00e9ment, et cela nous permet de mieux comprendre comment le mot \u00ab quantique \u00bb est utilis\u00e9 dans l&rsquo;expression \u00ab science quantique \u00bb. De notre point de vue, l&rsquo;eau semble continue, comme si on pouvait la diviser en gouttes de plus en plus petites. Il n&rsquo;est pas du tout \u00e9vident qu&rsquo;il existe un plus petit morceau d&rsquo;eau. Le mot \u00ab quantique \u00bb a commenc\u00e9 \u00e0 \u00eatre utilis\u00e9 par les scientifiques pour d\u00e9signer quelques cas o\u00f9 il semblait que quelque chose \u00e9tait continu ou divisible \u00e0 l&rsquo;infini, mais o\u00f9 il s&rsquo;est av\u00e9r\u00e9 qu&rsquo;il y avait quelque chose de d\u00e9nombrable.   <\/p>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"452\" height=\"631\" src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png\" alt=\"\" class=\"wp-image-4681\" style=\"width:58px\" srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1.png 452w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-blue-1-215x300.png 215w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading has-text-align-left\"><strong>Le fait que l&rsquo;eau soit compos\u00e9e de mol\u00e9cules d&rsquo;eau d\u00e9nombrables, ou que les choses soient plus g\u00e9n\u00e9ralement compos\u00e9es d&rsquo;atomes que l&rsquo;on peut compter, est-il un exemple de science quantique ?<\/strong><\/h4>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img decoding=\"async\" width=\"469\" height=\"609\" data-src=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png\" alt=\"\" class=\"wp-image-4685 lazyload\" style=\"--smush-placeholder-width: 469px; --smush-placeholder-aspect-ratio: 469\/609;width:58px\" data-srcset=\"https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1.png 469w, https:\/\/quantum2025.org\/wp-content\/uploads\/2025\/03\/Quinnies-Transp-pink-1-231x300.png 231w\" data-sizes=\"(max-width: 469px) 100vw, 469px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p>\u00c9tonnamment, non. L&rsquo;id\u00e9e que les choses sont faites d&rsquo;atomes remonte \u00e0 des milliers d&rsquo;ann\u00e9es, et la compr\u00e9hension moderne qu&rsquo;il existe diff\u00e9rents \u00e9l\u00e9ments chimiques, chacun avec son propre type d&rsquo;atome, date d&rsquo;environ 200 ans. Il s&rsquo;agit l\u00e0 d&rsquo;id\u00e9es tr\u00e8s importantes qui permettent d&rsquo;affirmer que la mati\u00e8re est constitu\u00e9e de morceaux d\u00e9nombrables, mais il ne s&rsquo;agit pas des quanta dont il est question dans la science quantique. Il s&rsquo;agit l\u00e0 d&rsquo;un point assez d\u00e9routant, car il est vrai que la science quantique est largement utilis\u00e9e pour comprendre les d\u00e9tails des atomes et des mol\u00e9cules, mais il n&rsquo;est pas vrai que le mot \u00ab quantique \u00bb dans ce contexte se r\u00e9f\u00e8re au fait que les atomes et les mol\u00e9cules sont des \u00e9l\u00e9ments d\u00e9nombrables. Le mot \u00ab quantique \u00bb a commenc\u00e9 \u00e0 \u00eatre utilis\u00e9 il y a un peu plus de 100 ans pour d\u00e9signer <em>d&rsquo;autres<\/em> cas o\u00f9 des choses qui semblaient continues ou divisibles \u00e0 l&rsquo;infini s&rsquo;av\u00e9raient avoir un aspect d\u00e9nombrable.    <\/p>\n<\/div>\n<\/div>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<p>R\u00e9dig\u00e9 par Paul Cadden-Zimansky, professeur associ\u00e9 de physique au Bard College et coordinateur mondial de l&rsquo;AIV.<\/p>\n\n<p>La personnage officiel de l&rsquo;AIV, <a href=\"https:\/\/quantum2025.org\/fr\/news-link\/votre-guide-dans-le-monde-quantique\/\">Quinnie<\/a>, a \u00e9t\u00e9 cr\u00e9\u00e9e par Jorge Cham, alias PHD Comics, en collaboration avec <a href=\"https:\/\/physics.aps.org\/\">Physics Magazine.<\/a> Tous droits r\u00e9serv\u00e9s.<\/p>\n\n<p>Image principale: Yan Krukau. <\/p>\n\n<p><\/p>\n","protected":false},"featured_media":4661,"template":"","keywords":[63,64,55],"class_list":["post-4782","news-link","type-news-link","status-publish","has-post-thumbnail","hentry","keywords-education","keywords-physics","keywords-quantum-science"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Que signifie \u00ab quantique \u00bb ? - IYQ 2025<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Que signifie \u00ab quantique \u00bb ? - IYQ 2025\" \/>\n<meta property=\"og:description\" content=\"2025 est l&rsquo;Ann\u00e9e internationale des sciences et technologies quantiques. 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