IBM has successfully joined and cooled down two cryogenic modules into a single environment, a significant step toward the company’s first fault-tolerant quantum computer.
The technology is designed to scale into a modular and shared but ultra-cold system that could link hundreds of quantum chips into a more powerful quantum computer. Called IBM Quantum Starling and billed as a world’s first, the quantum computer is targeted for 2029.
Together, the modules stand more than 8 feet tall and 8 feet wide. IBM said initial tests demonstrated the cryogenic environment can jointly cool down to 4 Kelvin in under 5 days. Ultimately, it would reach a final temperature of below 15 millikelvins — more than 180 times colder than deep space.
Additionally, each module’s vacuum enclosure offers up to 12 times more wiring space than other IBM quantum systems. The company said this is significant because it allows more chip-to-chip connections both within and between modules.
The cryogenic module that stands 8 feet tall and 8 feet wide combined. The module will reach a final temperature of more than 180 times colder than deep space. Source: IBM
Specifically, the design of the environment allows modules to connect in a tight row and use the larger space to directly link quantum processors with IBM’s L-coupler technology, which connects separate quantum chips together to share information and operate as part of a larger quantum computer.
"Bringing fault-tolerant quantum computers to industries depends on several fundamental advances,” said Jay Gambetta, director of IBM Research and IBM Fellow. “The successful connection and operation of these cryogenic modules signals a leap forward in that direction and will accelerate our progress alongside continued innovation in quantum hardware, software, and algorithms.”
IBM roadmap
The cooling environment keeps IBM on track with its quantum roadmap. The next step is to use L-couplers to link multiple processors into a larger computer with at least 1,000 programmable qubits that can be used to perform computations directly. IBM's target for that step is 2027.
IBM said it will install IBM Quantum Nighthawk processors into the cryogenic modules later this year to expand operational performance testing. When Starling is delivered, IBM plans for each cryogenic module to house thousands of qubits.
