University of Chicago researchers have made a major breakthrough in quantum internet infrastructure, developing a new method to grow ultra-pure rare-earth crystals that extend quantum coherence times from 0.1 ms to over 24 ms.
This enables long-distance quantum entanglement over up to 4,000 km of fiber, expanding the range of quantum communication from mere city blocks to intercontinental links.
From Crystal Growth to Space Missions 🛰️
By switching from traditional Czochralski growth to molecular beam epitaxy (MBE), researchers achieved atomic-scale purity, eliminating defects that disrupt quantum states.
The technology is now being tested in 1,000 km optical fiber setups, simulating real-world urban-scale deployments. In parallel, the SQUIRE project aims to launch quantum spin sensors into orbit via the Chinese Space Station, probing exotic physics using long-lived coherent spin systems.
📅 Date: November 13, 2025
In short, this crystal-based advance makes a global quantum internet technically feasible, enabling secure quantum communications and interconnected quantum sensors on Earth and in space — a step toward the next revolution in connectivity.