Flexible multi-hop non-destructive teleportation via non-maximally entangled GHZ channels
TL;DR
This work proposes a flexible multi-hop non-destructive teleportation via non-maximally entangled GHZ channels, where the network is partitioned into upstream and downstream segments and any intermediate node possesses high-dimensional unitary operation capability, making the teleportation process flexible in terms of node deployment and operational responsibility, thereby reducing the requirements for the communication terminals.
Abstract
Quantum teleportation is one of the key technologies enabling long-distance quantum communication. However, the decoherence in realistic channels makes it difficult to maintain maximal entanglement. Furthermore, the capability to perform high-dimensional unitary operations poses a significant challenge, as not all the nodes in the quantum network possess this ability. Meanwhile, low transmission rates also hinder the development of quantum networks. We propose a flexible multi-hop non-destructive teleportation via non-maximally entangled GHZ channels, where the network is partitioned into upstream and downstream segments. Direct entanglement channels are established via simultaneous entanglement swapping and multi-level hierarchical swapping. Channel modulation is performed by the selected intermediate parties with high-dimensional operational capabilities and auxiliary particles. In this framework, the sender and the receiver are responsible only for information transmission, while other intermediate nodes perform only basic operations, such as Bell-state and Hadamard (H) measurements. In this scheme, any intermediate node possesses high-dimensional unitary operation capability, making the teleportation process flexible in terms of node deployment and operational responsibility, thereby reducing the requirements for the communication terminals.