IBM Cools Quantum Computers Below 15 Millikelvin, More Than 180 Times Colder Than Deep Space
Updated
Updated · Engadget · Oct 25
IBM Cools Quantum Computers Below 15 Millikelvin, More Than 180 Times Colder Than Deep Space
3 articles · Updated · Engadget · Oct 25
Summary
IBM’s latest modular cryogenic system runs below 15 millikelvin—just above absolute zero—to keep quantum processors stable enough to operate.
That extreme cooling limits heat-driven qubit decoherence, where tiny energy disturbances scramble linked quantum states and increase calculation errors.
The main engineering bottleneck is wiring: control lines come from room temperature and conduct heat downward, so adding more qubits can make the system harder to keep cold.
Other architectures dodge the giant-fridge design in different ways—QuEra’s neutral-atom systems use lasers to reach microkelvin temperatures, while photonic machines keep many components at room temperature but still cool detectors.
Reliable large-scale quantum machines could speed tasks like molecular simulation, but they also threaten current encryption; Google estimates put RSA-2048 cracking below 1 million noisy qubits, versus today’s hundreds to low thousands.