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Derivative in Dirac Notation

  1. Jul 6, 2009 #1
    Hi everybody,

    I am trying to get the partial derivative of the following with respect to Si[t] and Phi[t] separately:


    The operator H is the partial derivative with respect to t.

    I tried this in Mathematica, calling


    but I end up with an strange term : " zz080Bra' "

    Any help and advice in this line is appreciated.
  2. jcsd
  3. Jul 7, 2009 #2


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    I don't see how to make sense of this. For starters, if [itex]|\phi(t)\rangle[/itex] is a ket, [itex]\phi(t)[/itex] doesn't make sense on its own, and [itex]\partial/\partial\phi(t)[/itex] makes even less sense.
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