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Improving Teleportation of Quantum Fisher Information and Fidelity for Entangled State Under Decoherent Channel

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Abstract

In virtue of weak measurement and measurement reversal, we have studied the improvement of teleportation of a two-qubit entangled state through quantum channels with decoherence. We mainly concern two aspects. One is the teleportation of the whole quantum state quantified by fidelity, the other is transmission of information encoded in the teleported state evaluated by quantum Fisher information (QFI). The significant similarities and differences between the teleported QFI and fidelity are analyzed in detail. We show that the enhancement of teleported QFI and fidelity can be achieved by weak measurement with optimal measurement reversal. Improving QFI teleportation is more efficient than improving fidelity, since the former has higher success probabilities under the same condition.

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Funding

This work was supported by the Natural Science Foundation of China (Grant Nos. 11305114, 11304226, 11505126), and the Program for Innovative Research in University of Tianjin (Grant No.TD13-5077).

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Authors and Affiliations

  1. College of Physics and Materials Science, Tianjin Normal University, Tianjin, 300387, China

    Jingjing Cao, Lele Zhai & Jin-Liang Guo

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  1. Jingjing Cao
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  2. Lele Zhai
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  3. Jin-Liang Guo
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Correspondence to Jin-Liang Guo.

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Cao, J., Zhai, L. & Guo, JL. Improving Teleportation of Quantum Fisher Information and Fidelity for Entangled State Under Decoherent Channel. Int J Theor Phys 61, 22 (2022). https://doi.org/10.1007/s10773-022-04999-x

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