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Homework Help: Calculate the commutator [p x , x[SUP]n[/SUP]]

  1. Nov 12, 2013 #1
    Calculate the commutator [px, xn]

    1. The problem statement, all variables and given/known data

    There are 3 tasks.
    1) No other information is given. only that I have to calculate the commutator [px, xn].

    For task 2 and 3 a relevant equation is given below.

    2) calculate the commutator [x, Kx]

    3) calculate the commutator [px, Kx]

    2. Relevant equations

    We define the kinetic energy operator of a particle in one dimension (x) as

    Kx = - (h(hatch)2/2m)(d2/dx2)

    I hope anyone can help me. I am really stuck with these commutators.

    - HP
  2. jcsd
  3. Nov 19, 2013 #2
    Try multiplying the commutator at the right by some phantom ket |K>...
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