 Entanglement fidelity

ID: entanglement-fidelity

For a purification

∣ Ψ_{ρ} ⟩_{R A}

, the entanglement fidelity of a channel

Λ

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

It is independent of the chosen purification.

 New to topics? Read the docs here!