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Homework Help: Angular momentum operator eigenvalues in HO potential.

  1. Jan 16, 2012 #1
    1. The problem statement, all variables and given/known data
    Find wave functions of the states of a particle in a harmonic oscillator potential
    that are eigenstates of Lz operator with eigenvalues -1 h , 0, 1 h and have smallest possible eigenenergies. Check whether these states are also the eigenstates of L^2 operator. Eventually, write the wave functions using spherical coordinates and normalize independently
    their radial and angular parts.
    2. Relevant equations

    3. The attempt at a solution
    I know that solution of eigen-problem for $L_{z}$ operator is:
    [tex] psi(\theta, \phi)= P(\theta) e^{im\phi} [/tex]
    But i don't know how to include harmonic oscillator potential into this problem. I already proved that eigenstates of Lz are also eigenstates of L^2. Thanks for any advice !
  2. jcsd
  3. Jan 17, 2012 #2


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    Homework Helper

    This suggests that the question is about about a 3d isotropic harmonic oscillator. The solutions might looks similar to the hydrogenic atom, but be careful. Were you set this as homework? Its pretty difficult to do something like this from first principles...
  4. Jan 17, 2012 #3
    Yes it's my homework actually. So the suggestion is to solve the radial equation, for the HO potential [tex]\frac{1}{2}\omega mr^{2}[/tex]. For l=-1,0,1 and then "combine" it with the angular part of wavefunction for different m values ?
  5. Jan 17, 2012 #4


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    Staff Emeritus
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    Homework Helper
    Education Advisor

    You need to solve the Schrodinger equation using the harmonic oscillator potential. Use separation of variables.
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