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Homework Help: Momentum eigenfunctions

  1. Dec 16, 2005 #1
    Is exp (- mod(x)/a) an eigenfunction of momentum. I know that this is not differentiable at x = 0, but does this completely disqualify it from being a momentum eigenfunction?
  2. jcsd
  3. Dec 16, 2005 #2

    Physics Monkey

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    That state doesn't have the same derivative above and below zero, so clearly it isn't a momentum eigenstate.
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