Spin-rotation coupling
= Spin-rotation coupling
{title2=$H_{\mathrm{rot}}=-\boldsymbol\Omega\cdot\boldsymbol J$}
The <spin-rotation coupling> contribution to a rotating-frame <Hamiltonian> couples <angular velocity> to <angular momentum>. When discussing <spin> alone, identify which part of the total <angular momentum> enters the effective model.