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Author Topic:   Teleportation
crashfrog
Member (Idle past 1498 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 6 of 9 (662204)
05-13-2012 12:27 PM
Reply to: Message 1 by GDR
05-13-2012 10:39 AM


I think this article deeply confuses the concept of quantum-entanglement cryptography with teleportation.
If they're transmitting photons, which it's clearly stated that they are, then it's not teleportation, now is it? They're transmitting entangled photons, not teleporting them, and the reason you'd want to do that is because it defeats a "man in the middle" attack against the communications channel - the act of receiving the photons disrupts the entanglement, and it's impossible to re-entangle them again, so you'd know if you were receiving the transmission direct from your partner, or if a third-party had intercepted and re-transmitted.
This doesn't allow for any sort of FTL communication because there's no teleportation of anything. This is just a kind of special transmission of photons with cryptographic implications. They're not overcoming the speed of light.

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Replies to this message:
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crashfrog
Member (Idle past 1498 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


(1)
Message 7 of 9 (662205)
05-13-2012 12:28 PM
Reply to: Message 2 by fearandloathing
05-13-2012 11:04 AM


If I understand it correctly, and we could increase the distances, then it could make real-time communication possible with space probes or a mars base ect.
Well, you don't understand it correctly, but it's not your fault because the writer of the article didn't understand it either.
FTL communication is not possible by this method.

This message is a reply to:
 Message 2 by fearandloathing, posted 05-13-2012 11:04 AM fearandloathing has seen this message but not replied

  
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