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Canadian researchers, with partners including Caltech and Fermilab, demonstrated quantum teleportation and entanglement distribution over urban fiber-optic networks in Calgary. They achieved entanglement fidelities exceeding 90% over 44 kilometers.

The project, part of Canada's National Quantum Strategy with $360 million funding, aims to ensure quantum networks can coexist with existing fiber infrastructure. The initiative addresses security threats posed by quantum computers to sensitive data.

Future phases include expanding metropolitan networks and developing hybrid networks with satellite links. Key challenges include photon loss over distance, low quantum teleportation rates, and lack of standardization.