« Répéteur quantique » : différence entre les versions


m (ClaireGorjux a déplacé la page Quantum repeater vers Répéteur quantique)
m (Remplacement de texte : « == en construction == » par «  »)
 
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==en construction==
 
 
==[[:Catégorie:Quantique| '''INFORMATIQUE QUANTIQUE''']]==


== Définition ==
== Définition ==
XXXXXXXXX
Cristal capable de capter l’[[état quantique]] d’un photon incident puis d’émettre un photon dans le même état.


== Français ==
== Français ==
''' XXXXXXXXX '''
'''répéteur quantique'''


== Anglais ==
== Anglais ==
''' Quantum repeater '''
'''quantum repeater'''


Materials in cables can absorb photons, which means they can typically travel for no more than a few tens of kilometers. In a classical network, repeaters at various points along a cable are used to amplify the signal to compensate for this.
==Sources==
[https://www.technologyreview.com/2019/02/14/103409/what-is-quantum-communications/    Source : technologyreview]


QKD networks have come up with a similar solution, creating “trusted nodes” at various points. The Beijing-to-Shanghai network has 32 of them, for instance. At these waystations, quantum keys are decrypted into bits and then reencrypted in a fresh quantum state for their journey to the next node. But this means trusted nodes can’t really be trusted: a hacker who breached the nodes’ security could copy the bits undetected and thus acquire a key, as could a company or government running the nodes.
[https://www.btb.termiumplus.gc.ca/tpv2alpha/alpha-fra.html?lang=fra&i=1&srchtxt=quantum+repeater&codom2nd_wet=1#resultrecs  Source : TERMIUM Plus ]


Ideally, we need quantum repeaters, or waystations with quantum processors in them that would allow encryption keys to remain in quantum form as they are amplified and sent over long distances. Researchers have demonstrated it’s possible in principle to build such repeaters, but they haven’t yet been able to produce a working prototype.
[https://www.usinenouvelle.com/editorial/un-repeteur-pour-l-internet-quantique.N548983  Source : Usine Nouvelle ]


There’s another issue with QKD. The underlying data is still transmitted as encrypted bits across conventional networks. This means a hacker who breached a network’s defenses could copy the bits undetected, and then use powerful computers to try to crack the key used to encrypt them.




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{{Modèle:Quantique}}
 


[https://www.technologyreview.com/2019/02/14/103409/what-is-quantum-communications/    Source : technologyreview]


[[Catégorie:Quantique]]
[[Catégorie:Quantique]]
[[Catégorie:vocabulary]]

Dernière version du 15 novembre 2024 à 11:07


INFORMATIQUE QUANTIQUE

Définition

Cristal capable de capter l’état quantique d’un photon incident puis d’émettre un photon dans le même état.

Français

répéteur quantique

Anglais

quantum repeater

Sources

Source : technologyreview

Source : TERMIUM Plus

Source : Usine Nouvelle

Récupérée de « https://datafranca.org/wiki/index.php?title=Répéteur_quantique&oldid=110272 »

Contributeurs: Claire Gorjux, wiki