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China is working towards using quantum physics to beam light and matter across free space. It thus far claims to have achieved photon transport across a distance of 10 miles, over 25 times the previous U.S./European record.  (Source: Fried Post)
Chinese researchers use quantum physics to "teleport" photons across 10 miles of empty space

China has been taking a beating in the U.S. press lately. the Chinese company Foxxconn has experienced problems with employees committing suicide, the country has not warmed up toU.S. greenhouse gas cut initiatives and has placed a ban on internet maps and satellite imaging. However, the country can be commended for its latest effort -- achieving quantum teleportation.

Scientists at the University of Science and Technology of China and Tsinghua University were able to stream quantum information over 16 km of free space, approximately 10 miles. It's called teleportation, but the matter is not actually moved, instead the quantum state of an object is transferred to another (when something is done to the first object, it immediately happens to the second one). 

According to the
Shanghaiist website, "It's connecting two photons in a way that when one photon is changed, the other changes simultaneously, allowing for information to be transported between the two without using signals or networks. The protons in this case interacted with '89% fidelity,' meaning that there's a few more tests necessarily before anything can seriously be 'beamed' anywhere."

While we can't "beam" anything up, exactly -- this achievement by China has brought the world the closest that it has ever come to attempting matter teleportation.  Because of this advancement we are closing in on the ability to one day send and connect information from long distance without signal interference.

The U.S. and European Union have also conducted teleportation experiments.  However, the longest distance they have claimed thus far is quantum teleportation over 600 m, which achieved across the Danube River in 2004.  The Chinese claim would be over 25 times as long a teleportation event



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No Information Transfer
By MozeeToby on 5/28/2010 3:07:32 PM , Rating: 0
Keep in mind that this does not transfer information instantaneously between the two sites. Yes, I know it seems strange, yes I know it seems like you should be able to, but the fact of the matter is that you can't. If you could, all of relativity would have to be rewritten and/or you can kiss causality goodbye (effects could happen before the events that caused them).




RE: No Information Transfer
By invidious on 5/28/2010 3:12:27 PM , Rating: 4
Just because it's not instantanious doesn't mean it cant be used for information transfer. Fiber optics aren't instantanious but are still a lot better than copper wire.


RE: No Information Transfer
By Murloc on 5/28/10, Rating: 0
RE: No Information Transfer
By Fritzr on 5/29/2010 3:06:57 AM , Rating: 3
It is a means to transfer info ... delay still uncertain, just not instantaneous. 89% accuracy is usable with ECC, but would not want to use a transporter until that raw accuracy improves a bit.


RE: No Information Transfer
By tastyratz on 6/4/2010 12:17:39 PM , Rating: 2
just remember that a monkey is more than 89% common with humans... I second the waiting on improved accuracy for the sake of all things hairy...


RE: No Information Transfer
By clovell on 5/28/2010 3:42:53 PM , Rating: 5
Yes, but relatively preceded quantum physics by decades - it's subject to revision.


RE: No Information Transfer
By MrBlastman on 5/28/2010 3:51:33 PM , Rating: 5
With entanglement-assisted teleportation this is so due to the requirement of a photon channel to bridge the distance to allow classical communication methods to interpret the channel.

However, in pure entanglement, information does transfer instantaneously but, if you were to try and read it, at least, according to accepted quantum theory, the entangled properties would be broken and the information that was received would be disturbed and then destroyed in the process. See Bell's theorem for more information semi-directly pertaining to this.

Mind you--this is still in its infancy and who knows what the future may hold for manipulation of entangled states through string theory. String theory opens the doors wide open to all sorts of freaky possibilities through folding upwards into higher dimensions to manipulate objects in our dimension through another over great distances without ever actually crossing them.

I wouldn't rule faster-than-light communication out completely. While we might have a hard time traversing large distances at the speed of light (or a small one if you already are close to it in spacial terms), there might be seemingly improbable ways to us now that will be opened up in the future.

Here's one article that suggests a different way it might be allowed:

http://arxiv.org/abs/gr-qc/0107091


RE: No Information Transfer
By lukasbradley on 5/28/10, Rating: 0
RE: No Information Transfer
By dj LiTh on 5/28/2010 4:59:51 PM , Rating: 4
general relativity falls on its face when dealing with quantum mechanics.


RE: No Information Transfer
By UnWeave on 5/30/2010 9:02:11 PM , Rating: 2
Quantum mechanics falls flat on its face when dealing with general relativity.

The two are largely incompatible (at present), but that doesn't mean QM is 'more right' than GR. For one, we have basically no idea why QM works; relativity at least has a more solid basis: experimental evidence suggests the speed of light is a universal constant. QM is more "Well, if we quantize everything, do the maths... and, holy crap, it works!"

I'm pretty sure most of my Physics professors would agree that in, say, 50 years time, we'll be looking back on today's QM and loling (though you could say that about many areas of all the natural sciences).

Also, since FTL communication allows you to violate causality, leading to all kinds of wacky shit, I'm not at all convinced it will ever be possible (but, of course, that is wild speculation on my part; maybe the universe doesn't really care if it you go back in time and stab your granddad).


RE: No Information Transfer
By P4iN on 5/31/2010 12:58:30 PM , Rating: 2
I heard QM and Relativity actually are compatible in a black hole cause positive particles stay out and show as radiation that was the proof of black holes existence anyway.

I believe Hawkins will find a theory of everything before he dies. And with recent developments with string theory and other multiverse theories, that day is coming closer than we think. QM and Relativity will reach some kind of understanding


RE: No Information Transfer
By dj LiTh on 6/1/2010 11:53:34 PM , Rating: 2
quote:
Quantum mechanics falls flat on its face when dealing with general relativity.


Yes thanks for saying the same thing as me in a different way.

Look, put simply , general relativity is the theory that governs everything large, quantum mechanics is the theory that governs everything small.


RE: No Information Transfer
By sviola on 5/28/2010 5:11:37 PM , Rating: 3
But isn't science all about understanding better natures phenomena? As we advance and discover new things, I can assure you past theories will have to be reviewed and probably rewritten (this has happened many times in history and will continue to happen). Don't new discoveries change our view of things? Back in 1800's atoms were undivisable, then they were composed of protons, neutrons and electrons, which have been discovered to be composed of other elements.

In science nothing is absolute. All can change with a new discovery.

On a nice quote:
"Any sufficiently advanced technology is indistinguishable from magic. " -- Sir Arthur Charles Clarke


RE: No Information Transfer
By Mk4ever on 5/28/2010 6:36:24 PM , Rating: 3
Sheldon?

Is that you?


RE: No Information Transfer
By Mk4ever on 5/28/2010 6:39:30 PM , Rating: 2
Sorry. Was just watching an episode of "Big Bang Theory". I couldn't resist!


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