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arXiv

Quantum utility routing raises mean path SKR by 193.2% over A* in CV-QKD networks while using 78.4% fewer nodes than Max–Min

The authors introduce Quantum Utility Routing (QUR), a weighted routing framework for continuous-variable quantum key distribution networks that embeds transition-level composable finite-size secret key rates directly into the route search, with a graph-optimized mode (QURgo) and a machine-learned fixed-weight mode (QURfw); at the default configuration on Waxman graphs, QURgo increases mean path SKR by 193.2% relative to A* while using 78.4% fewer nodes than Max–Min, and maintains 100.0% routing success when 76.3% of nodes are untrusted.