There is an uncertainty relation between the x component and the y component of the angular momentum(adsbygoogle = window.adsbygoogle || []).push({}); of a particle, because [LL_{x}, L_{y}] = i[itex]\hbar[/itex]L_{z}which is not 0.

But what happens when L_{z}does equal 0? Would we in principle be able to measure both the x and y components of the angular momentum with no uncertainty? What kind of state would this describe?

I've searched my textbooks and the web for an answer to this question, but I haven't found any, so maybe this is actually something really obvious which I'm not seeing! Thanks for your help!

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# Uncertainty Relation between Lx and Ly

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