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Quantum Teleportation Achieved Over 16 km In China 389

Posted by timothy
from the can-feel-it-from-here dept.
Laxori666 writes "Scientists in China have succeeded in teleporting information between photons farther than ever before. They transported quantum information over a free space distance of 16 km (10 miles), much farther than the few hundred meters previously achieved, which brings us closer to transmitting information over long distances without the need for a traditional signal."
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Quantum Teleportation Achieved Over 16 km In China

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  • by Anonymous Coward on Saturday May 22, 2010 @04:29PM (#32308770)

    Before you think this is awesome, this is not an ansible, information is transmitted at lightspeed only.

  • Re:Progress.. (Score:5, Insightful)

    by Pharmboy (216950) on Saturday May 22, 2010 @04:30PM (#32308782) Journal

    And once they get to an economic level that is closer to what the rest of us enjoy in the Western world, they will start caring. When you are hungry, you only want bread. When you are homeless, you only want shelter. When you have plenty to eat and a decent place to live, you want freedom.

  • I don't get it (Score:5, Insightful)

    by Adrian Lopez (2615) on Saturday May 22, 2010 @04:37PM (#32308850) Homepage

    Isn't it impossible to transmit information via quantum entanglement? Since you cannot determine the state of an entangled particle, you cannot use it to "transmit" information until after you let the other end know, through conventional channels, what each possible state actually stands for. If that's the case, how exactly is this "quantum information transfer" supposed to work.

  • Re:Obligatory (Score:5, Insightful)

    by jo_ham (604554) <joham999@noSPaM.gmail.com> on Saturday May 22, 2010 @04:37PM (#32308854)

    Dare I say, if you don't find xkcd funny, the material might be somewhat... not aimed at you.

    To be delicate.

    Especially if you don't find *any* of them funny (although not all of them are designed to be humourous).

  • Peer Reviewed (Score:5, Insightful)

    by areusche (1297613) on Saturday May 22, 2010 @04:39PM (#32308874)

    http://science.slashdot.org/story/10/04/19/0132246/Chinas-Research-Ambitions-Hurt-By-Faked-Results

    This story alone makes me skeptical about any major scientific breakthroughs until someone can peer review the results.

    Congrats to the hardworking people on the project, however I will be applauding their work with less skepticism when I hear that MIT, Cornell, CMU, etc confirm the results.

  • Re:Progress.. (Score:5, Insightful)

    by Jah-Wren Ryel (80510) on Saturday May 22, 2010 @04:42PM (#32308904)

    When you have plenty to eat and a decent place to live, you want freedom.

    Or maybe you are just too scared of losing that prosperity that you decide not to rock the boat. [newsweek.com]

  • Re:Progress.. (Score:2, Insightful)

    by gsgriffin (1195771) on Saturday May 22, 2010 @05:15PM (#32309228)
    and when you finally have freedom, you then want the government to do everything for you and regulate everything that is not perfect in hopes that the government will make it perfect...then you lose your freedom again.
  • Re:Philotics (Score:3, Insightful)

    by thrawn_aj (1073100) on Saturday May 22, 2010 @06:24PM (#32309694)

    Half of it nobody understands anyway.

    Only because "understanding" appears to be highly variable concept depending on field of study. Non-physicists assume that just because a concept cannot be explained in simple (i.e. classical) terms, it has "not been understood". This requirement is foolish. The simplest way (and I'm really oversimplifying here) to see why is to remember that classical physics is a special case of quantum physics. How could you possibly explain everything in the superset in terms of the subset? Paradoxes are the pornography of the pseudo-intellectual.

  • by Old Wolf (56093) on Saturday May 22, 2010 @07:25PM (#32310090)

    Knowing when to observe it doesn't make a difference. The problem is that if Alice observes and sees "down", then she knows that Bob's observation (whether it was before hers or after!) will be "up", but this hasn't conveyed any information.

    The measurement is symmetric with respect to each end. In fact it's not even defined which measurement occurs first , if they both measure at a close enough time that the events are not in the same light-cone in spacetime.

  • Bullshit article (Score:4, Insightful)

    by copponex (13876) on Saturday May 22, 2010 @10:17PM (#32311054) Homepage

    "The Asian crisis was a turning point in that sense," says Brookings Institution senior fellow Homi Kharas, who studies the new global middle class. "These countries began pursuing liberalization in their own way, at their own pace, and they've done well. Now they see their success as the fruit of their own efforts," even though it was attained under global systems of free trade and finance set up by the West.

    When someone is gently tugging your dick, keep your hand on your wallet. China and India have been successful because they did not adapt Western financial values. Ditto for Brazil and any other country who was large enough to avoid being pressured into the Chicago school of self-destructive economics. Since 1980, the Western world has been destroying markets and free trade by eliminating regulations and fairness - the only things that keep a market competitive, just as a vibrant independent press is that only thing that keeps democracies truly free.

    China will soundly destroy the American economy because 1) it's still developing and four times our population, 2) it's typically not imperialistic outside it's own borders, and 3) it's not being run by a voting bloc which believes literally that the earth is 6,000 years old.

    Our founding fathers decried Europe for being chained by the monarchist traditions and the shackles of dogmatic religious squabbling. Well, guess who the new Europe is. We just traded Monarchy for Corporatism.

  • by NicknamesAreStupid (1040118) on Sunday May 23, 2010 @12:31AM (#32311714)
    but no one was there to hear it. Would there still be information? Ah, the philosophy of quantum physics. I know nothing about physics, ever had a class. After reading 238 postings on this topic, I still know nothing but feel like I am in good company.

Stinginess with privileges is kindness in disguise. -- Guide to VAX/VMS Security, Sep. 1984

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