{"id":24093,"date":"2024-07-11T15:14:42","date_gmt":"2024-07-11T15:14:42","guid":{"rendered":"https:\/\/www.qureca.com\/?page_id=24093"},"modified":"2025-11-07T09:09:58","modified_gmt":"2025-11-07T09:09:58","slug":"quest-ce-que-le-quantique","status":"publish","type":"page","link":"https:\/\/www.qureca.com\/fr\/apprendre-le-quantique\/quest-ce-que-le-quantique\/","title":{"rendered":"Qu’est-ce que le quantique ?"},"content":{"rendered":"
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Qu’est-ce que le quantique ?<\/h1>\n<\/div><\/div>
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La physique quantique fait r\u00e9f\u00e9rence aux principes fondamentaux qui r\u00e9gissent le comportement de la mati\u00e8re et de l’\u00e9nergie \u00e0 l’\u00e9chelle la plus petite. Sur cette page, vous obtiendrez une compr\u00e9hension de base de ce que sont ces technologies et dans quels domaines divers elles fa\u00e7onneront l’avenir. Que vous soyez un d\u00e9butant curieux ou un passionn\u00e9 cherchant des perspectives approfondies, nous avons des cours pour vous permettre d’en apprendre davantage sur la physique quantique !<\/h4>\n<\/div><\/div>
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Ph\u00e9nom\u00e8nes quantiques<\/span><\/a><\/div>
Technologies quantiques<\/span><\/a><\/div>
Cas pratiques<\/span><\/a><\/div><\/div><\/div><\/div>
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Ph\u00e9nom\u00e8nes quantiques<\/h2>\n

Les technologies quantiques exploitent les principes de la m\u00e9canique quantique pour construire des outils puissants de traitement de l’information. Ces technologies sont issues de l’ing\u00e9nierie des \u00e9tats quantiques individuels.<\/h3>\n<\/div><\/div>
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Qubit<\/h3>\n<\/div><\/div>
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C\u2019est l\u2019analogue quantique du bit classique. Alors qu\u2019un bit ne peut valoir que 0 ou 1, un qubit peut \u00e9galement se trouver dans une combinaison (superposition) des deux.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Mesure<\/h3>\n<\/div><\/div>
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C\u2019est la capacit\u00e9 d\u2019un syst\u00e8me quantique \u00e0 exister dans plusieurs \u00e9tats simultan\u00e9ment. Par exemple, un qubit peut \u00eatre \u00e0 la fois dans l\u2019\u00e9tat 0 et 1.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Superposition<\/h3>\n<\/div><\/div>
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Lorsqu\u2019on mesure un syst\u00e8me quantique, on n\u2019observe pas directement la superposition : celle-ci s\u2019effondre, et le syst\u00e8me prend une valeur concr\u00e8te.
\nCe processus est probabiliste, et la probabilit\u00e9 d\u2019obtenir chaque r\u00e9sultat est d\u00e9termin\u00e9e par l\u2019\u00e9tat de superposition avant la mesure.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Intrication<\/h3>\n<\/div><\/div>
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Deux ou plusieurs particules quantiques peuvent \u00eatre corr\u00e9l\u00e9es de telle mani\u00e8re que la mesure de l\u2019une d\u00e9termine instantan\u00e9ment l\u2019\u00e9tat de l\u2019autre, m\u00eame si elles sont s\u00e9par\u00e9es par de grandes distances.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Tunneling<\/h3>\n<\/div><\/div>
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Les particules quantiques ont une probabilit\u00e9 non nulle de traverser des barri\u00e8res, m\u00eame sans poss\u00e9der l\u2019\u00e9nergie n\u00e9cessaire. Ce ph\u00e9nom\u00e8ne joue un r\u00f4le essentiel dans des processus tels que la fusion nucl\u00e9aire et dans des dispositifs \u00e9lectroniques comme le microscope \u00e0 effet tunnel.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section>

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Technologies quantiques<\/h2>\n

Gr\u00e2ce au contr\u00f4le au niveau des particules individuelles des ph\u00e9nom\u00e8nes quantiques mentionn\u00e9s ci-dessus, le quantum red\u00e9finit le paysage technologique et notre compr\u00e9hension de l’univers \u00e0 travers les nouveaux domaines suivants.<\/h3>\n<\/div><\/div>
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Informatique et simulation
\nquantique<\/h3>\n<\/div><\/div><\/div><\/div><\/div>
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Capteurs
\nquantiques<\/h3>\n<\/div><\/div><\/div><\/div><\/div>
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Communication et s\u00e9curit\u00e9
\nquantique<\/h3>\n<\/div><\/div><\/div><\/div><\/div><\/div>
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Vous voulez en savoir plus sur le domaine quantique ?<\/h3>\n<\/div><\/div>
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D\u00e9couvrez notre cours \u00ab\u00a0La physique quantique pour tous !\u00a0\u00bb (en anglais)<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/section>
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L’avenir est quantique<\/h2>\n

Les technologies exploitant les lois de la physique quantique sont capables de relever certains des plus grands d\u00e9fis auxquels l’humanit\u00e9 est confront\u00e9e \u00e0 l’\u00e8re num\u00e9rique.<\/h3>\n<\/div><\/div>
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D\u00e9couvrez nos cas pratiques !<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"Qu’est-ce que le quantique ? La physique quantique fait r\u00e9f\u00e9rence aux principes fondamentaux qui r\u00e9gissent le comportement de la mati\u00e8re et de l’\u00e9nergie \u00e0 l’\u00e9chelle la plus petite. 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