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Scientists teleport data 10 miles

C

CosmicSpork

New Member
arg-fallbackName="CosmicSpork"/>
About a month old but I found this very interesting.
Scotty won't beam anybody anywhere anytime soon, but a new report by Chinese scientists shows that it is possible to transmit information over long distances using quantum entanglement. The research, published in the current issue of the journal Nature Photonics, could lead to faster and smaller quantum-based computers and unbreakable, encrypted communication across the world.

The team reported they were able to "teleport" information 16 kilometers, or 9.9 miles.

"This is the longest reported distance over which photonic teleportation has been achieved to date, more than 20 times longer than the previous implementation," said Cheng-Zhi Peng, one of the co-authors of the study and a scientist at University of Science and Technology of China and Tsinghua University in Beijing.

In science fiction, teleportation usually describes the transfer of matter from one point to another, more or less instantaneously. In real physics, it's considered part of the "spookier" aspects of quantum mechanics (as Einstein famously derided the nascent field), that describes the behavior of the atoms and their constituent particles.

Read the rest...
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http://news.discovery.com/tech/teleportation-quantum-mechanics.html
 
arg-fallbackName="Eban"/>
Wonderful news. Though I was always of the impression that instantaneous data transmission via quantum entanglement was a theoretical no-no.
 
arg-fallbackName="borrofburi"/>
Eban said:
Wonderful news. Though I was always of the impression that instantaneous data transmission via quantum entanglement was a theoretical no-no.
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It is. I scanned the article to see if it was doing that, and they say (paraphrased) "no, there'd still have to be a key sent slower than light to decipher what was sent" which means that information is not being sent faster than light... Or it is, but it's unintelligible until after the normal limits.
 
arg-fallbackName="sgrunterundt"/>
The point is that they send quantum information this way. It has great prospects for quantum computing and for cryptography.
 
arg-fallbackName="DeathofSpeech"/>
borrofburi said:
It is. I scanned the article to see if it was doing that, and they say (paraphrased) "no, there'd still have to be a key sent slower than light to decipher what was sent" which means that information is not being sent faster than light... Or it is, but it's unintelligible until after the normal limits.
Click to expand...

Okay, I'm stumped. What prevents the use of a predetermined key?
 
arg-fallbackName="Nautyskin"/>
DeathofSpeech said:
borrofburi said:
It is. I scanned the article to see if it was doing that, and they say (paraphrased) "no, there'd still have to be a key sent slower than light to decipher what was sent" which means that information is not being sent faster than light... Or it is, but it's unintelligible until after the normal limits.
Click to expand...

Okay, I'm stumped. What prevents the use of a predetermined key?
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The answer, it would seem, is the same thing that stops you watching TV shows on your television.
 
arg-fallbackName="borrofburi"/>
DeathofSpeech said:
borrofburi said:
It is. I scanned the article to see if it was doing that, and they say (paraphrased) "no, there'd still have to be a key sent slower than light to decipher what was sent" which means that information is not being sent faster than light... Or it is, but it's unintelligible until after the normal limits.
Click to expand...

Okay, I'm stumped. What prevents the use of a predetermined key?
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I'm not certain... Every time I encounter one of these things though, I think the idea is that you have to change something (and remember, looking at it can change it), and then you have to let the party you are sending it to know that it has been changed (because they can't constantly be monitoring it, or they'd be constantly changing it)... I think. I know the paradigm of "change something and then let the other people know its been changed" is the one I usually hear, but I don't know if those are the reasons usually given.
 
arg-fallbackName="Eban"/>
I wonder if you can use entanglement to remove heat. A quantum heatsink, throw one end into interstellar space and you've got an eternal cooler. Well, within limits of the far end's ability to radiate. That would of course open the door to far more terrifying uses.
 
arg-fallbackName="JustBusiness17"/>
I thought they did this much longer than a month. I remember hearing about this several months ago... Then again, I have a very poor conception of time :?
 
arg-fallbackName="borrofburi"/>
Eban said:
I wonder if you can use entanglement to remove heat. A quantum heatsink, throw one end into interstellar space and you've got an eternal cooler. Well, within limits of the far end's ability to radiate. That would of course open the door to far more terrifying uses.
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No. This would violate either relativity or thermodynamics (probably relativity, heat can travel no faster than light speed (especially heat radiation, which is just EM, i.e. light).
 
arg-fallbackName="Eban"/>
borrofburi said:
Eban said:
I wonder if you can use entanglement to remove heat. A quantum heatsink, throw one end into interstellar space and you've got an eternal cooler. Well, within limits of the far end's ability to radiate. That would of course open the door to far more terrifying uses.
Click to expand...
No. This would violate either relativity or thermodynamics (probably relativity, heat can travel no faster than light speed (especially heat radiation, which is just EM, i.e. light).
Click to expand...


Well if you're teleporting information then you're by definition teleporting energy. Seems to me it's just a matter of degrees.
 
arg-fallbackName="borrofburi"/>
Eban said:
borrofburi said:
No. This would violate either relativity or thermodynamics (probably relativity, heat can travel no faster than light speed (especially heat radiation, which is just EM, i.e. light).
Click to expand...
Well if you're teleporting information then you're by definition teleporting energy. Seems to me it's just a matter of degrees.
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It's not precisely information that's being teleported (information can not travel faster than light). And I'm pretty sure there will be significant energy usage and loss on both ends of the "teleporter".
 
arg-fallbackName="Amerist"/>
Soon we shall have the technology to create the Ancible and then we will go to war against the Buggers.
 
arg-fallbackName="borrofburi"/>
Amerist said:
Soon we shall have the technology to create the Ancible and then we will go to war against the Buggers.
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Technically we'd have to go to war against the buggers, twice, and then find an ancible.
 
arg-fallbackName="Amerist"/>
borrofburi said:
Amerist said:
Soon we shall have the technology to create the Ancible and then we will go to war against the Buggers.
Click to expand...
Technically we'd have to go to war against the buggers, twice, and then find an ancible.
Click to expand...
Damn, I really need to re-read those books... I've forgotten so much!
 
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