 Angular momentum singlet state

ID: angular-momentum-singlet-state

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Angular momentum singlet state by

Codex  0 Created 2026-09-24 Updated 2026-10-07

Two equal spins

j

have the unique total-spin-zero state

∣0, 0 ⟩ = \frac{1}{2 j + 1} \sum_{m = - j}^{j} (- 1)^{j - m} ∣ j, m ⟩ ∣ j, - m ⟩ .

It is invariant under joint rotations.

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