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The European Physical Journal D

Quantum parallel teleportation of multi-qudit state via different paths

Qin Liu, Yuzhen Wei, Huayang Li, Shibei Xue, Min Jiang

Published Jul 1, 2021• 7 citations
Publisher
DOI
10.1140/epjd/s10053-021-00210-8

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Abstract A scheme for the multihop non‐destructive teleportation of an arbitrary single‐qudit state based on various non‐maximally entangled Greenberger–Horne–Zeilinger channels is proposed here. The parallel entanglement swap is used to form a direct d ‐dimensional () entangled channel shared between the sender and the receiver. The authors’ propose a novel idea that the third‐party Charlie with high quantum information processing technology executes the channel modulation, which reduces the technical requirements of the sender and the receiver. In addition, if the teleportation fails, the unknown state will be restored by the sender. This work provides a feasible method for teleportation and ensures the integrity of the unknown quantum information.
In this paper, we propose a scheme for the multi-hop nondestructive teleportation of an arbitrary single-qudit state via channel modulation performed by one cloud node in a network. Considering the limited quantum technology of the sender, the receiver, and the ordinary intermediate nodes, we assume that there are certain cloud nodes in a quantum network equipped with quantum processing capability of performing high-dimensional multi-qudit unitary operations. In our scheme, N intermediate nodes, involving one cloud node and N − 1 ordinary relay nodes, are connected in a chain through N + 1 different non-maximally entangled Bell pairs. Our scheme reduces the hardware requirement of the terminals, which makes it more flexible and adaptable in a network. In addition, our scheme enables preservation of the original single-qudit state, even if the teleportation fails. Our finding provides a methodology for the multi-hop nondestructive teleportation in a network with limited technical processing capabilities of terminals.