Black Flash Posted April 15, 2011 Share Posted April 15, 2011 Researchers from Australia and Japan have successfully teleported wave packets of light, potentially revolutionizing quantum communications and computing.The team, led by researchers at the University of Tokyo, said this is the first-ever teleportation, or transfer, of a particular complex set of quantum information from one point to another. They say it will make possible high-speed, high-fidelity transmission of large volumes of information, such as quantum encryption keys, via communications networks. The research appeared Friday in the journal Science. Elanor Huntington, a professor in the School of Engineering and Information Technology at the University of New South Wales in Australia, explained that teleportation ? the transfer of quantum information from one location to another using normal, "classical" communications ? is a fundamental quantum communication technique. "It relies on having two things," she said. "One is the normal fibre optic internet or even copper cables, and the other is a shared resource between the sender and the receiver, that could have been shared at any time in the past: we call that entanglement." Huntington says the idea of quantum teleportation has been around for about ten years, but has been difficult to put into practice. "There used to be two ways of doing teleportation and both had their limitations," she said. "One was quite fast, but had a limited probability of succeeding. The other way of doing it was quite slow, but had a very good probability of working." "What we've done is managed to get it both fast and good quality," she says. Schrodinger's cat comes back They did it by teleporting the wave packets of light in a 'Schr?dinger's cat' state. In Schr?dinger's famous thought experiment of the 1930s, a cat would be placed in a sealed box with a device containing atomic material. A Geiger counter was included to measure radiation if at some point an atom decayed. Should that happen, the Geiger counter would trigger the release of cyanide gas, which would kill the cat. The idea was that it was impossible to know whether or not the cat was alive or dead without opening the box and observing it, and that until that happened, both realities existed. This became known as superposition. Schr?dinger's is said to have devised the experiment to ridicule the emerging theories of quantum physics; but since then physicists have found many examples of superposition in the quantum world. "What was funky about Schrodinger's idea was that you could take a normal macroscopic object, which we all think we know and understand fairly well, and you could put it into a quantum superposition ? and that's kind of weird," said Huntington. "Nowadays any kind of system where you do that is known as a Schr?dinger's cat." "So in our case what we've done is take a macroscopic beam of light and put it into a quantum superposition, which is extremely fragile, and teleported that from one place to another." "One of the ways that we encode digital information is by its phase," Huntington says, "so what we've done is created a wave packet that's simultaneously a one and a zero in its phase." "Superposition is exactly what underlies the power of things like quantum computers. You enable parallel processing because at the same time it's a one and a zero. The point is, we've managed to teleport it from A to B without the one and the zero getting confused," she said. Huntington said being able to demonstarte this will enable researchers to take the next step in quantum computing. "[being able to transfer data packets like this] is a necessary thing to do in order to build a proper quantum computer or a quantum communications device," she said. Source:CBC Link to comment Share on other sites More sharing options...
Billmaster Posted April 15, 2011 Share Posted April 15, 2011 Win! Link to comment Share on other sites More sharing options...
Teebor Posted April 15, 2011 Share Posted April 15, 2011 Dammit, had this been written by a Dr Sam Beckett it would have been awesome Link to comment Share on other sites More sharing options...
Bamsebjørn Posted April 15, 2011 Share Posted April 15, 2011 I approve of this. Can someone add a "Bamsebj?rn approved" seal please? Link to comment Share on other sites More sharing options...
sc302 Veteran Posted April 15, 2011 Veteran Share Posted April 15, 2011 Dammit, had this been written by a Dr Sam Beckett it would have been awesome Yes it would. Is there going to be a human sized chamber to be able to take a quantum leap? Link to comment Share on other sites More sharing options...
OuchOfDeath Posted April 15, 2011 Share Posted April 15, 2011 Physics, and quantum physics in particular is so stupidly complex. I was having a discussion with a friend about quantum entanglement and how it breaks the speed of light limit since it's supposed to be instantaneous, hence teleportation. The friend then informed me that quantum entanglement is in fact not instantaneous and travels at the speed of light. Since the friend is way more knowledgeable about math and physics than I ever will I have a hard time believing this article. Does anyone with knowledge of physics and quantum in particular feel like throwing out more information on all of this? EDIT: "Hard time believing this article" = Going under the assumption that when they use the term "teleport" they mean instantaneous. Link to comment Share on other sites More sharing options...
rob.derosa Posted April 15, 2011 Share Posted April 15, 2011 No quantum entanglement is instantaneous, but you cannot use it to transmit information. This way relativity is not contradicted. Link to comment Share on other sites More sharing options...
Memphis Posted April 15, 2011 Share Posted April 15, 2011 Physics, and quantum physics in particular is so stupidly complex. I was having a discussion with a friend about quantum entanglement and how it breaks the speed of light limit since it's supposed to be instantaneous, hence teleportation. The friend then informed me that quantum entanglement is in fact not instantaneous and travels at the speed of light. Since the friend is way more knowledgeable about math and physics than I ever will I have a hard time believing this article. Does anyone with knowledge of physics and quantum in particular feel like throwing out more information on all of this? I think that is were superposition comes into play. To my limited understanding though entaglement is instant, however their are seriousde doubts as to whether a quantum state would allow for instant communication given that mere observation of quantum events makes it go from both state being yes to one being a no, Link to comment Share on other sites More sharing options...
rob.derosa Posted April 15, 2011 Share Posted April 15, 2011 I think that is were superposition comes into play. To my limited understanding though entaglement is instant, however their are seriousde doubts as to whether a quantum state would allow for instant communication given that mere observation of quantum events makes it go from both state being yes to one being a no, Say you created two entangled photons heading in different directions (you can see that this isn't going to be a revolutionary communications method since you are limited by the speed of the entangled photon!). Someone measures one at position A and notices it to be in spin 1, and someone at position B measures the other to be spin -1. What information have you imparted here? Given that when you release the photons they are BOTH a superposition as either 1 or -1. Link to comment Share on other sites More sharing options...
Lezard Posted April 15, 2011 Share Posted April 15, 2011 Chuck Norris approves If the velocity of light is to be used as a way for Quantum Entanglement then they would had not even bothered. Quantum teleportation is the ability of Quantum to exchange places with the other Quantum. Link to comment Share on other sites More sharing options...
spudtrooper Posted April 15, 2011 Share Posted April 15, 2011 (edited) sorry double post nah, wasn't a double post, it was just a succesfull quantum correlation correctly decoded Edited April 15, 2011 by GreyWolf Sorry, I deleted the double-post before it became funny. Link to comment Share on other sites More sharing options...
The_Observer Posted April 15, 2011 Share Posted April 15, 2011 so when can i use this for my torrents, need to defeat the NZ Government now they have crap internet laws! Link to comment Share on other sites More sharing options...
Lezard Posted April 15, 2011 Share Posted April 15, 2011 40years from now, but ComT&T Will have it with a Instant delivery download speeds but with a 400MB cap Link to comment Share on other sites More sharing options...
Geoffrey B. Veteran Posted April 15, 2011 Veteran Share Posted April 15, 2011 why do I have a feeling someone somewhere is already trying to figure out how this is going to help the adult entertainment industry? Link to comment Share on other sites More sharing options...
Lezard Posted April 15, 2011 Share Posted April 15, 2011 My name is Mister M, I put the Penetration in your teleportation. Link to comment Share on other sites More sharing options...
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