New posts in Quantum Spin

What experiment confirms $\mathbf{J}^2 = \hbar^2 j(j+1)$?

Why is helicity a good quantum number while spin isn't?

What happens to spin after measurement, does it evolve and randomise like position evolves after measurement?

Why Is an Inhomogenous Magnetic Field Used in the Stern Gerlach Experiment?

Does spin really have no classical analogue?

Is spin necessary for electromagnetism?

What is the analogue for symplectic structure in case of spin variables?

Why are Lagrangians linear in $\dot{q}$ so ubiquitous? Gauge theory, Berry phase, Dirac Equation, and more

Can quantum entanglement be used to coordinate actions at "FTL speeds" without breaking causality or actual faster-than-light communication?

What does this notation for spin mean? $\mathbf{\frac 1 2}\otimes\mathbf{\frac 1 2}=\mathbf{1}\oplus\mathbf 0$