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Quantum communication

  1. Feb 21, 2013 #1
  2. jcsd
  3. Feb 22, 2013 #2

    mfb

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    Staff: Mentor

    You cannot transfer (useful) information quicker than light (or without any transfer of light, particles or similar). You can get the same bits at the same time at two positions far away, but you cannot set those bits at one side to receive them at the other.
     
  4. Feb 22, 2013 #3
    I did not assume it.Could you teleport it slower than light and have two way communication?In one place I read that quantum communication maybe used for satellites.
    If so, than any conventional link of communication will NOT be used?
    http://www.quantum.at/research/quan...tanglement/entangled-photons-over-144-km.html
    http://ieeexplore.ieee.org/xpl/logi.../ieeexplore.ieee.org/iel5/2944/28271/01263786
    http://www.newscientist.com/article/dn19234-satellite-quantum-communication-circles-closer.html
     
  5. Feb 22, 2013 #4

    mfb

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    Staff: Mentor

    You always need a transfer channel to transmit information from A to B. This can be classical, this can be particles in specific quantum states, or whatever, but you have to transfer something.
     
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