Render Posted April 30, 2013 #1 Share Posted April 30, 2013 (Phys.org) —Researchers at TU Delft in the Netherlands have managed to bring two electrons, three meters from each other, into a quantum- entangled state. This result marks a major step towards realizing a quantum network that can be used to connect future quantum computers and to send information in a completely secure way by means of 'teleportation'. The results have been published online on April 24 in Nature http://phys.org/news...te-network.html Link to comment Share on other sites More sharing options...
Frank Merton Posted April 30, 2013 #2 Share Posted April 30, 2013 Well, three meters is an achievement, but isn't the hundreds or even thousands of km. that will be needed to do what you say. I think standard cryptographic methods, in spite of their theoretical vulnerability, will be around awhile. 1 Link to comment Share on other sites More sharing options...
Taun Posted April 30, 2013 #3 Share Posted April 30, 2013 Even if and when they do get a viable, functioning quantum network going (if it's even possible)... There will be some knucklehead who figures out how to hack it and intercept the data transfer... so the need for encryption will be here for as long as there are at least three people still living on the planet... 1 Link to comment Share on other sites More sharing options...
ExpandMyMind Posted April 30, 2013 #4 Share Posted April 30, 2013 (edited) Even if and when they do get a viable, functioning quantum network going (if it's even possible)... There will be some knucklehead who figures out how to hack it and intercept the data transfer... so the need for encryption will be here for as long as there are at least three people still living on the planet... Yeah, but once it is encrypted via quantum computing I don't think anyone will be hacking it anytime soon. 'The vision of quantum computing is to enable computers to do "millions of computations at once" with a single qubit. According to IBM, a 250-qubit system "contains more bits of information than there are atoms in the universe.' http://www.tomshardw...ters,14832.html And, Frank, if IBM are correct in saying that they just about have the quantum computer licked (which they very-well might not be), then that will be the end of current, bit-based encryption methods. Edited April 30, 2013 by ExpandMyMind Link to comment Share on other sites More sharing options...
Frank Merton Posted April 30, 2013 #5 Share Posted April 30, 2013 The idea of using entangled particles to send secrets is that if anyone reads the message the entanglement is broken and you know it has been read. Using quantum computers for encryption is a different matter. 1 Link to comment Share on other sites More sharing options...
freetoroam Posted April 30, 2013 #6 Share Posted April 30, 2013 this stuff is way over my head! 3 Link to comment Share on other sites More sharing options...
sepulchrave Posted April 30, 2013 #7 Share Posted April 30, 2013 Well, three meters is an achievement, but isn't the hundreds or even thousands of km. that will be needed to do what you say. I think standard cryptographic methods, in spite of their theoretical vulnerability, will be around awhile. The authors create the entanglement between the two electrons with light. It is currently possible (but difficult) to maintain photon entanglement over a hundred km or so. I am not sure what the current state of the art is for carrying entangled photons alone fibre optics (here is a review, but it is 5 years old) but it may not be so far off. I was under the impression that the major obstacle was preserving entanglement in the electrons for any significant period of time. As I see it (I could be wrong) entanglement is an even more ``fragile'' problem then simply manipulating electron spin, so I think that on-chip devices are the major hurdle. 1 Link to comment Share on other sites More sharing options...
Calle Posted May 1, 2013 #8 Share Posted May 1, 2013 There will always be hackers no matter how strong the Enecryption gets 1 Link to comment Share on other sites More sharing options...
Frank Merton Posted May 1, 2013 #9 Share Posted May 1, 2013 This is entanglement, not encryption. It is not code breaking, just a way of knowing whether or not the message was intercepted. Once broken there would be utterly no way to hide it. Link to comment Share on other sites More sharing options...
Render Posted May 7, 2013 Author #10 Share Posted May 7, 2013 Government Lab Reveals It Has Operated Quantum Internet for Over Two Years A quantum internet capable of sending perfectly secure messages has been running at Los Alamos National Labs for the last two and a half years, say researchers http://www.technologyreview.com/view/514581/government-lab-reveals-quantum-internet-operated-continuously-for-over-two-years/ Link to comment Share on other sites More sharing options...
Calle Posted May 12, 2013 #11 Share Posted May 12, 2013 @Render Since like there 3 capable quantum computers and they don't come cheap Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now