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Multipartite Einstein-Podolsky-Rosen Steering may lead to ultra-secure internet
- trurl42 13y agoThe content of the article is freely accessible on the arXiv: http://arxiv.org/abs/1212.2270 http://arxiv.org/abs/1212.2270 And no, this will not lead to ultra-secure internet, which also isn't even mentioned in the article.
- crashandburn4 13y agoExactly, I find it ridiculous that someone or other adds these titles somewhere and no-one disputes them even when the papers have very little to do with the title whatsoever.
- Loughla 13y agoIt's not ridiculous. It's the first rule of all internet forums. No one reads the articles.
- crashandburn4 13y agoTrue, so what _should_ happen is that the title summarizes and maybe provides additional data about the content of the article rather than says something else, I accept that that doesn't happen but I also say it's ridiculous. :)
- keithpeter 13y agoThanks for posting that, although a bus ride to my local University library to consult Phys Rev Letters seems attractive in a nostalgic kind of way. No direct bearing on the suggestion in the title, but... http://journals.aps.org/pr/pdf/10.1103/PhysRev.47.777 http://journals.aps.org/pr/pdf/10.1103/PhysRev.47.777 Original EPR paper. I return to this paper each decade and work through it. About due for another bash now. No references! http://philoscience.unibe.ch/documents/TexteHS10/bell1964epr.pdf http://philoscience.unibe.ch/documents/TexteHS10/bell1964epr... John Bell's paper on EPR.
- jessriedel 13y agoIf any HN title ought to be changed to prevent editorializing, this one should. And that will justly kill this article.
- akie 13y agoA dummy explanation for non-physicists like me (from http://www.swinburne.edu.au/engineering/caous/news_and_events/mulitipartite%20EPR%20steering%20paper.htm http://www.swinburne.edu.au/engineering/caous/news_and_event...): "Einstein's reservations about quantum mechanics were encapsulated in the 1935 Einstein, Podolsky, Rosen paradox, which highlighted the theory's strange nonlocality. In this paper, we give theoretical proof that special quantum states allow Einstein's nonlocality to be genuinely shared among many observers, regardless of the spatial separation between them. These states possess a property (which Schrodinger called "steering") that not all quantum entangled states have, and may provide unprecedented security for a future quantum internet. Suppose Alice has a secret message to transmit. Alice may use the states to send multiple parties a quantum encryption key, or, if the message is highly important, she can "secret share" i.e. distribute the key among the receiving parties, so they must collaborate to decipher the message. The important new feature is that (unlike ordinary entanglement) Einstein's nonlocality cannot be faked by classical means without Alice's collusion. Assuming her station is secure, this enables detection not only of hacking attacks during transmission, but of dishonest receivers or sabotage of devices at receiving stations. We show that the special states can be created in different forms so they are useful for messages carried either as optical amplitudes or as photonic qubits."
- clef 13y agoWe might use it for teleportation in 500/600 years.
- btilly 13y agoNo. Quantum entanglement does not allow for transmission of information faster than light. And therefore does not allow you to suddenly move objects from one place to another. What it does allow for is the synchronization of random data between two places faster than light. So two receivers can securely find themselves in the possession of a shared encryption key, that can then allow them to send information in a way that intermediates can't intercept.
- coldcode 13y agoI have to admit I understood almost nothing of the abstract.
- marcosdumay 13y agoJust to make it clear, the usual caveats of quantum cryptography apply: 1 - It requires direct physical links between the involved parties. 2 - It does not provide authentication, and thus is subject to man in the middle attacks.