Prove that the 3D harmonic oscillator orbital angular momentum operators are given by (boldsymbol{L}=i boldsymbol{a} times boldsymbol{a}^{dagger}).

Question:

Prove that the 3D harmonic oscillator orbital angular momentum operators are given by \(\boldsymbol{L}=i \boldsymbol{a} \times \boldsymbol{a}^{\dagger}\). Show that the components \(L_{k}\) obey the commutator (10.13).

Data from Eq. 10.13

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