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Homework Help: Electron Clebsch-Gordon coefficients

  1. Feb 18, 2015 #1
    The problem statement, all variables and given/known data
    The state of an electron is,

    |Psi> =a|l =2, m=0> ⊗ |up> + Psi =a|l =2, m=1> ⊗ |down>,

    a and b are constants with |a|2 + |b|2 = 1
    choose a and b such that |Psi> is an eigenstate of the following operators: L2, S2, J2 and Jz.

    The attempt at a solution

    I am really not sure where to start on this, i have tried reading through previous threads on the coefficients and i am still confused.

    For a start does the statement above mean that the wavefunction describes both a spin up and spin down arrangement, both of which are possible at any time? And do i need to treat this as two particles, one spin up and one spin down?
  2. jcsd
  3. Feb 19, 2015 #2
    Anyone got any ideas that could help?
  4. Feb 19, 2015 #3


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    It simply means that your electron is in a superposition between two states, one which has orbital angular momentum 2 with orbital angular momentum z-component 0 and spin up and another which has orbital angular momentum 2, orbital angular momentum z-component 1, and spin down. Your task is to adjust the linear combination such that the resulting state is an eigenstate of the list of operators.

    As a first step, do you know how these operators act on this state?
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