Overview
- Using Qunnect’s GothamQ testbed, the partners executed polarization entanglement swapping across 17.6 km of deployed fiber linking Brooklyn and Manhattan via QTD Systems’ 60 Hudson Street data center.
- Automatic polarization controllers compensated for drift on urban fiber, with company-reported results showing over 99% polarization fidelity during field operations.
- Independent atomic entanglement sources removed the need for a shared master laser as Cisco’s orchestration software coordinated the network to support a scalable hub-and-spoke design.
- The collaborators reported swapping rates of about 1.7 million entangled pairs per hour locally and roughly 5,400 per hour over deployed fiber, which they characterize as far above earlier benchmarks.
- Cisco frames the outcome as a step toward connecting quantum processors and ultra-secure links, while a separate Deutsche Telekom T-Labs trial in Berlin used Qunnect hardware to teleport qubits over more than 30 km of commercial fiber with about 90% average accuracy.