Entanglement breaks new record

From: Sam Wormley (swormley1_at_mchsi.com)
Date: 06/30/04 

Date: Wed, 30 Jun 2004 17:32:25 GMT

Ref: http://physicsweb.org/article/news/8/6/18

  Physicists have succeeded in entangling five photons for the first
  time. Although four photons have been entangled before, five is the
  minimum number needed for universal error correction in quantum
  computation. Moreover, the same team has demonstrated a process
  called "open-destination teleportation" for the first time (Z Zhao et
  al. 2004 Nature 430 54). The results represent a major breakthrough
  in efforts to exploit the laws of quantum mechanics in quantum
  information processing.

  By taking advantage of quantum phenomena such as entanglement,
  teleportation and superposition, a quantum computer could, in
  principle, outperform a classical computer in certain computational
  tasks. Entanglement allows particles to have a much closer
  relationship than is possible in classical physics. For example, two
  photons can be entangled such that if one is horizontally polarized,
  the other is always vertically polarized, and vice versa, no matter
  how far apart they are. In quantum teleportation, complete
  information about the quantum state of a particle is instantaneously
  transferred by the sender, who is usually called Alice, to a receiver
  called Bob. Quantum superposition, meanwhile, allows a particle to be
  in two or more quantum states at the same time.

See: http://physicsweb.org/article/news/8/6/18

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