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Multi-Hop Teleportation of an Unknown Qubit State Based on W States

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Abstract

Quantum teleportation is important in quantum communication networks. Considering that quantum state information is also transmitted between two distant nodes, intermediated nodes are employed and two multi-hop teleportation protocols based on W state are proposed. One is hop-by-hop teleportation protocol and the other is the improved multi-hop teleportation protocol with centralized unitary transformation. In hop-by-hop protocol, the transmitted quantum state needs to be recovered at every node on the route. In improved multi-hop teleportation protocol with centralized unitary transformation, intermediate nodes need not to recover the transmitted quantum state. Compared to the hop-by-hop protocol, the improved protocol can reduce the transmission delay and improve the transmission efficiency.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 61571105, Grant No. 61601120).

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Authors and Affiliations

  1. State Key Lab of Millimeter Waves, Southeast University, Nanjing, 211189, China

    Xiang-Zhen Zhou & Xu-Tao Yu

  2. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 211189, China

    Zai-Chen Zhang

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  1. Xiang-Zhen Zhou
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  2. Xu-Tao Yu
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  3. Zai-Chen Zhang
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Correspondence to Xu-Tao Yu.

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Zhou, XZ., Yu, XT. & Zhang, ZC. Multi-Hop Teleportation of an Unknown Qubit State Based on W States. Int J Theor Phys 57, 981–993 (2018). https://doi.org/10.1007/s10773-017-3631-0

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  • DOI: https://doi.org/10.1007/s10773-017-3631-0

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