backtop


Print 38 comment(s) - last by tastyratz.. on Jun 4 at 12:17 PM


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



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

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


"And boy have we patented it!" -- Steve Jobs, Macworld 2007














botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki