IBM has introduced a new cryogenic cooling system that can maintain quantum computers at temperatures below 15 millikelvin, which is equivalent to only 0.015 degrees above absolute zero.
This temperature is more than 180 times lower than the temperature found in deep space and represents a significant advance for the company in overcoming one of the biggest obstacles to developing fault-tolerant and scalable quantum computing.
This system operates as a modular unit, functioning like a quantum refrigerator, which allows for the simultaneous connection and operation of several quantum processors under extremely low temperature conditions.
Keeping components at such low temperatures is crucial, as quantum processors rely on superconducting qubits; any heating can affect the behavior of these components and generate errors during quantum operations.
For comparison, IBM processors require temperatures close to absolute zero, while deep space has an approximate temperature of 2.7 Kelvin, related to the cosmic background radiation.
The new IBM equipment reaches less than 15 millikelvin, demonstrating a considerable disparity compared to the space environment.
The focus is not just on achieving extreme cold, but on ensuring that the cooling is stable and functional while the processors perform quantum calculations, as well as enabling the interconnection of modules without compromising the environment necessary for the qubits.
Although it is a notable progress, the technology is still in its initial phase. IBM managed to connect two modules and keep them at the required temperatures, also performing simple operations with the Flamingo processor.
However, this does not imply that the company has proven the execution of complex quantum operations between different modules; this remains a future challenge for the project.
In the coming days, IBM plans to integrate the Nighthawk processors into the system to continue testing the architecture.
The implementation of the modular architecture is scheduled to begin in 2027, and a main goal for 2029 is the development of the Starling quantum computer.
Starling was designed to operate with 200 logical qubits and execute one hundred million quantum operations. Unlike physical qubits, which are vulnerable to errors, logical qubits are formed by several physical qubits and employ error correction methods to increase calculation reliability.
In this context, the new cryogenic architecture gains importance because it allows the connection between different quantum processors maintained at ultra-low temperatures, aiming to build an infrastructure capable of supporting systems much larger than what is possible in a single module.
Nevertheless, proving an architecture capable of performing complex operations between these modules remains an essential step before the conception of a large-scale fault-tolerant quantum computer materializes.



