Bluefors and Quantum Cryogenics: Building the Coldest Rooms on Earth

Updated 2026-10-11 | 4 min read | QUANTUM (QNT) community

Why quantum computers are so cold

Superconducting qubits only behave as qubits when they are extremely cold. Heat is random jiggling, and random jiggling destroys fragile quantum states. So the chip lives inside a dilution refrigerator that reaches temperatures tens of times colder than outer space. Our guide how quantum computers are cooled explains the physics. This page is about the companies that build the cold rooms, and what happens when you try to make them bigger.

The shape of a dilution refrigerator

A typical unit is a stack of plates, each colder than the one above, hanging inside a vacuum can. The chip sits at the bottom. Cables run down from the top, carrying control pulses and readout signals. Each extra cable brings a little heat, so the more qubits you add, the harder it is to stay cold. Wiring and cooling power are tied together.

Bluefors

Bluefors is a Finnish maker of dilution refrigerators and a well known supplier to quantum labs and companies. Reports name IBM as an early user of its large KIDE platform. Because the company is private, we rely on its own materials and trade coverage for details.

KIDE: a snowflake for qubits

Bluefors presented KIDE at the American Physical Society March Meeting in Chicago in 2022, with a prototype in development and a product launch expected in 2023. The name comes from the Finnish word for snowflake, because the platform is hexagonal. Reported design points from company material and trade coverage:

• It is built for large scale quantum computing and is described as supporting more than 1,000 qubits, with payloads up to 500 kilograms.
• Instead of a small vacuum can that must be lifted off to reach the wiring, the whole system sits inside a self supporting vacuum chamber with multiple access doors.
• Its modular hexagonal shape lets several units be connected while each payload stays reachable.
• The vacuum chamber is reported at just under 3 meters tall and 2.5 meters across, needing a floor able to carry about 7,000 kilograms.
• Company material reports room for about 4,000 signal lines or more, compared with about 1,000 in its standard XLDsl system, which it equates to a few hundred qubits.
• Nine pulse tube cryocoolers share the work between running the system, cooling the customer payload and cooling radiation shields.

A 2026 research preprint on thermal scalability modeled KIDE's available cooling at about 6 watts at its nominal 4 kelvin stage. That is the authors' modeling assumption, not a Bluefors specification, and it is one reason to read vendor specs with care.

Why cryogenics is a scaling story

• More qubits mean more wires. Better wiring, denser electronics and cryogenic control chips all help. See control systems.
• Bigger fridges are one answer, networks of fridges another. Linking separate cold units is a research frontier, tied to quantum networks.
• Not every qubit type needs it. Trapped ion, neutral atom and photonic machines use very different, mostly warmer setups, though photonic designs still need cold detectors. Silicon spin qubits also run cold, as the silicon guide shows.

An optimistic read

It is easy to think of cooling as a limit. It is just as fair to see it as an engineering challenge with clear paths: better cryocoolers, helium supply planning, higher density wiring, cold electronics and modular designs. Each of these is the kind of problem industry is good at. The headline is that the infrastructure side of quantum is professionalizing, with products you can buy, ship and install.

Caveats

• Specifications above are vendor reported and may have changed since 2023. Check current product pages.
• Our research did not find independent testing of KIDE's qubit capacity claims.
• Bluefors is not the only maker, and large players may build or specify their own cryogenic systems.

This page is education, not financial advice. Bluefors has no connection to the QNT memecoin. For the larger map, see the picks and shovels overview.

Sources and further reading

• Physics World: Bluefors presents KIDE at APS March Meeting 2022
• The Quantum Insider: Scaling up cryogenics for quantum computing
• arXiv preprint: Revisiting thermal scalability for large scale superconducting quantum systems
• Bluefors: company site

Reported as of 2026-10-09. Funding figures and performance numbers are company statements or press coverage, not audited facts. Educational overview only, not financial advice. The QNT memecoin is an independent community project and is not connected to any company named here, including Quantinuum Ltd.

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