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Abrupt decay of entanglement and quantum communication through noise channels

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Abstract

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.

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  1. Mathematics Department, Faculty of Science, South Valley University, Aswan, Egypt

    Nasser Metwally

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  1. Nasser Metwally
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Correspondence to Nasser Metwally.

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Metwally, N. Abrupt decay of entanglement and quantum communication through noise channels. Quantum Inf Process 9, 429–440 (2010). https://doi.org/10.1007/s11128-009-0149-2

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  • DOI: https://doi.org/10.1007/s11128-009-0149-2

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