 Single-use perfect discrimination of two unitary gates

ID: single-use-perfect-discrimination-of-two-unitary-gates

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

Perfect discrimination is possible exactly when some unit vector satisfies

⟨ ψ ∣ U_{2}^{†} U_{1} ∣ ψ ⟩ = 0.

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