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Coherence after decoherence

  1. May 24, 2013 #1
    ¿ What´s the matter if after decoherence the measured system coherences again with the bath ¿ Is measure erased
     
  2. jcsd
  3. May 24, 2013 #2

    mfb

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    Decoherence cannot be reversed, otherwise it is not a proper decoherence. You can prepare a new system in a coherent state, if you like.
     
  4. May 24, 2013 #3
    Well, in practical terms, it cannot. Decoherence is still a unitary process so it's reversible in principle. The point is just that you don't have the necessary control of your system's environment.
     
  5. May 24, 2013 #4
    http://en.wikipedia.org/wiki/Density_matrix#Entropy

     
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