 Projective unitary representation

ID: projective-unitary-representation

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Projective unitary representation by

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

Because state vectors differing by a quantum phase represent the same ray, a unitary realization of a group action need only satisfy

U (g_{1}) U (g_{2}) = e^{i ϕ (g_{1}, g_{2})} U (g_{1} g_{2}) .

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