Generating a long-distance quantum entanglement is one of the most essential functions of a quantum network to support quantum communication and computing applications. The successful entanglement rate during a probabilistic entanglement process decreases dramatically with distance, and swapping is a widely-applied quantum technique to address this issue. Most existing entanglement routing protocols use a classic entanglement-swapping method based on Bell State measurements that can only fuse two successful entanglement links. This paper appeals to a more general and efficient swapping method, namely n-fusion based on Greenberger-Horne-Zeilinger measurements that can fuse n successful entanglement links, to maximize the entanglement rate for multiple quantum-user pairs over a quantum network. We propose efficient entanglement routing algorithms that utilize the properties of n-fusion for quantum networks with general topologies. Evaluation results highlight that our proposed algorithm under n-fusion can greatly improve the network performance compared with existing ones.
@article{arxiv.2306.16671,
title = {Entanglement Routing over Quantum Networks Using Greenberger-Horne-Zeilinger Measurements},
author = {Yiming Zeng and Jiarui Zhang and Ji Liu and Zhenhua Liu and Yuanyuan Yang},
journal= {arXiv preprint arXiv:2306.16671},
year = {2023}
}