I have a Hamiltonian, consisting only of angular momentum components L(adsbygoogle = window.adsbygoogle || []).push({}); _{x},L_{y},L_{z}. I need to go from it to some coordinate representation. But I don't have derivatives Lx' etc. in H. So, when I'll go to coordinates and momenta I'll have Hamiltonian equations like p_i=0, which doesn't have sense.

How I need to go from H to x,y,z or \phi,\theta,r.

H=-K_{1}L_{x}^{2}+K_{2}L_{z}^{2}+H_{x}L_{x}+H_{y}L_{y}+H_{z}L_{z}

Going from L to angles can make no problem according to https://www.physicsforums.com/showthread.php?t=161865 in example

But back?

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# Homework Help: From angular momentum hamiltonian to angles(coordinates)

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