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Writing sin^2 theta * Sin 2 phi in terms of spherical Harmonics

  1. May 26, 2009 #1
    I am trying to write the term "Sin^2 theta * Sin 2 phi" in terms of spherical Harmonics (they form a combination of Y(2,-2) and Y(2,2)) but the term I get contains the imaginary number 'i'. Am I doing something wrong.. In fact this term is a part of a Hamiltonian and when I get the eigenvalues I find that some are complex! What is happening?


    Thanks
     
  2. jcsd
  3. May 26, 2009 #2

    malawi_glenn

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    It is very hard to tell what you are doing wrong if you don't show explicit the work you have done and how you motivate the steps.
     
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