We generalize the teleportation protocol of Bennet et al. to a noisy quantum teleportation protocol (NTP) in which noise factors are corresponded to noisy channels, imperfect measurement and non-maximally entangled channel (isotropic channel). Evolution of entanglement between every two parts of three-partite density matrix changing through five steps of NTP is considered employing concurrence and negativity measures. Then results of concurrence and negativity are evaluated and compared by mutual information as a criterion of correlation. We illustrate the necessity of entanglement in the middle steps of NTP.
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