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11 votes
4 answers
21k views

What is coherence in quantum mechanics?

What are coherence and quantum entanglement? Does it mean that two particles are the same? I read this in a book called Physics of the Impossible by Michio Kaku. He says that two particles behave in ...
user avatar
4 votes
1 answer
4k views

Quantum teleportation and no-communication theorem

According to the Wikipedia article for the No-communication theorem: In very rough terms, the theorem describes a situation that is analogous to two people, each with a radio receiver, listening to ...
SdSdsdsd's user avatar
11 votes
2 answers
1k views

Can't quantum teleportation be superluminal some percentage of times?

I apologize if this is a really silly question. In the (textbook) quantum teleportation algorithm, in the step right after Alice has measured her system but before she has sent her classical ...
Hugo Nava Kopp's user avatar
6 votes
1 answer
5k views

What are the benefits of quantum information "teleportation"?

I read occasionally popular science articles and from time to time encounter issues about quantum information teleportation. (this one for example http://www.physorg.com/news193551675.html) So far I ...
Andrey Tatarinov's user avatar
0 votes
1 answer
471 views

Is quantum teleportation really teleportation? [closed]

I don't understand how quantum teleportation is considered teleportation if no information is transfered (in q-bits). Wouldn't it be less misleading calling it "quantum encrypting" or something ...
Terran's user avatar
  • 211
-2 votes
1 answer
146 views

Does the success of quantum teleportation means quantum cloning is possible too?

Well, I thought this might just be possible. Instead of having Bob and Alice having an entangled pair, they have multiple (> 2) amount of entangled quantum object (I'm not sure if this is possible too,...
user35503's user avatar
-3 votes
2 answers
298 views

Communication via teleportation/entanglement (FTL communication)

I know this has been asked many times, but I have a hard time "crystallising" it in my mind. First: let's say we teleport a DVD (with quantum teleportation). Isn't this FTL communication? Second: ...
Nick's user avatar
  • 11