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Homework Help: Bra-kets and operator formalism in QM - Expectation values of momentum

  1. Oct 27, 2013 #1
    1. The problem statement, all variables and given/known data
    sup guys!

    I think I've solved this set of problems, but I was just wondering if I've done it right - I have no way to tell. I'll put all the questions and answers here - plus the stuff I used. So could you please tell me if there's any mistakes?
    Here it is - using Word as always!
    http://imageshack.com/a/img4/750/6i29.png [Broken]

    2. Relevant equations

    http://imageshack.com/a/img266/4082/58m3.jpg [Broken]

    BTW - I just realised I put in the transpose symbol instead of the dagger - i meant the dagger for the raising operator!
    3. The attempt at a solution
    http://imageshack.com/a/img546/7347/1oty.jpg [Broken]
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Oct 28, 2013 #2
    My solutions are here, have a look..

    Attached Files:

  4. Nov 7, 2013 #3
    If you are careful with the manipulations of the operators, it's an easy problem.
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