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