An exact equation relates the entanglement of imperfect joint measurements to channel entanglement and the probability needed for unit-fidelity teleportation despite coherent errors.
0 3 /8 3 /4 t 0 /8 /4 (a) 0 3 /8 3 /4 t 0.7 0.8 0.9 1.0Ftele (b) Optimal Standard Classical 2/30.1 0.4 0.7 1.0 Pmax succ FIG
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Quantum teleportation with coherent error in Bell-state measurement
An exact equation relates the entanglement of imperfect joint measurements to channel entanglement and the probability needed for unit-fidelity teleportation despite coherent errors.