We investigate the dynamics of two qubits state through the Bloch channel. Starting from partially entangled states as input state, the output states are more robust compared with those obtained from initial maximally entangled states. Also the survivability of entanglement increased as the absolute equilibrium values of the channel increased or the ratio between the longitudinal and transverse relaxation times gets smaller. The ability of using the output states as quantum channels to perform quantum teleportation is investigated. The useful output states are used to send information between two users by using the original quantum teleportation protocol.
Quantum Information Processing – Springer Journals
Published: Oct 24, 2009
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