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Detection Annihilation

  1. Aug 15, 2011 #1

    From the link above:
    "Physically, this formula means that a coherent state is left unchanged by the detection (or annihilation) of a particle."

    My question is, why is detection of a particle equivalent to annihilation of it?

    Thanks, Nate
  2. jcsd
  3. Aug 15, 2011 #2
    Re: Detection/Annihilation

    My understanding is that they aren't equivalent. It just means that the coherent state isn't changed when a particle is removed, which can happen whether it is detected or annihilated.
  4. Aug 16, 2011 #3
    Re: Detection/Annihilation

    I think you're correct. Thanks.
  5. Aug 16, 2011 #4
    Re: Detection/Annihilation

    No problem.
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