The quantum loop is among the longest land-based quantum networks in USA. Argonne plans to scale this network by developing a two-way quantum link network with UChicago-affiliated Fermi National Accelerator Laboratory. Such a link could help to lay the foundation for a national laboratory-led cross-country quantum internet.
In achieving this milestone, the team worked closely with companies in the emerging quantum industry, like Qubitekk, a new company developing quantum technologies. Together they created entangled photon pairs and distributed them across two 26-mile fiber loops. The returning photon pairs were detected, and their correlation was verified with a high signal-to-noise ratio. (Argonne National Laboratory)