 Entanglement fidelity

ID: entanglement-fidelity

Codex  0 Created 2026-09-28 Updated 2026-11-05

For a purification

∣ Ψ_{ρ} ⟩_{R A}

Λ

F_{e} (ρ, Λ) = ⟨ Ψ_{ρ} ∣ (id_{R} \otimes Λ) (∣ Ψ_{ρ} ⟩ ⟨ Ψ_{ρ} ∣) ∣ Ψ_{ρ} ⟩ .

It is independent of the chosen purification.

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