 Angular momentum addition

ID: angular-momentum-addition

j_{1}, j_{2}

into total

j = ∣ j_{1} - j_{2} ∣, \dots, j_{1} + j_{2}

. Scalar products follow from

2 J_{1} \cdot J_{2} = J^{2} - J_{1}^{2} - J_{2}^{2}

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