IBM has connected its first pair of modular cryogenic systems, a milestone it says clears a major hurdle on the road to fault-tolerant quantum computing.
The modules are box-shaped so they can sit in a tight row, and each vacuum enclosure frees up to 12 times more wiring space than IBM’s standard cryostats. In initial trials the paired units cooled together to 4 kelvin in under five days before settling below 15 millikelvin, with both standing more than 8 feet tall.
That extra room lets IBM wire quantum chips together directly using its L-coupler technology. The couplers sit at the center of the company’s 2027 goal of linking multiple processors into a single machine with at least 1,000 programmable qubits, and Nighthawk processors move into the modules later this year to widen performance testing.
The design builds on Starling, the error-correction architecture IBM introduced last year, and turns three core elements of its Quantum System Two into parts that can be tested and upgraded independently.
