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Ehrenfest theorem

  1. Oct 26, 2011 #1
    Might be trivial, but: In deriving it, I don't understand how the minus sign comes in to establish the [H,A] commutator. (it seems to me that both partial derivatives of ψ should come out positive)
    For example, in
    on page 5.
  2. jcsd
  3. Oct 26, 2011 #2


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    Search for the G. Frieseke's article on arxiv.org. That's the proof for general self-adjoint operators.
  4. Oct 26, 2011 #3
    Lol, those are my lecture notes.

    The minus sign is there because you have the i inside the bra and so when you take its complex conjugate you get a -i.
  5. Oct 26, 2011 #4
    right... Thanks!
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