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How do nonclassical observations influence eventual classical outcomes?

  1. Sep 17, 2004 #1
    Can the choices of quantum measurement ever affect subsequent macroscopic possibilities, or do their statistics always average out overall, a la the correspondence principle?
  2. jcsd
  3. Sep 17, 2004 #2


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    It is possible to arrange experiments so that the averaging does not wash out the effects. After all, all the "quantum weirdness" experiments show macroscopic effects (bands on a screen or whatever) from quantum causes.
  4. Sep 17, 2004 #3


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    That was the whole point of "Schroedinger's cat" wasn't it- that quantum measurements can affect macro systems?
  5. Sep 17, 2004 #4
    Thanks, folks, I just needed to be reminded.
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