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Fundamental characteristic property of particles which together with orbital angular momentum acts as the generator of rotations and which doesn't have a classical equivalent but is sometimes compared to and contrasted with classical intrinsic angular momentum.
7
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Why spin-$1/2$ objects don't have quadrupolar magnetic moment?
I'm asking myself more generally why a spin of size $S$ will feature multipolar states of degrees $k$ up to $2S$?
(This implies the question in the title: spin-$1/2$ can't have any quadrupolar contrib …
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How does the Wigner-Eckart theorem rule Multipole Expansion?
I am wondering why a spin-S particle have only the term up to $k=2S$ in his multipole expansion ?
It seems that the Wigner-Eckart theorem shows the relation between spin and multipole expansion but I …