This post covers two Dilution refrigerators, an integral part of Super Conducting Quantum computers.
In empty, interstellar space, the temperature is just 3 kelvins, not much above absolute zero. We can reproduce similar condition inside a lab, If you mix Helium-3 and Helium-4 Isotopes, you can provide cooling temperatures as low as 2 mk (colder than the interstellar space) with no moving parts - it is called "Cryogenic quantum computing device." A cryogenic device/icebox provides continuous cooling for quantum qubits to operate, entangle, and compute. The dilution refrigerators are an integral part of a Universal, Superconducting Quantum Computer. A new company (Maybellquantum, https://www.maybellquantum.com/icebox) now showcasing its latest product, an "icebox" that can hold/manage 3x more qubits in 1/10th the space of existing cryogenic systems while offering unprecedented "reliability, flexibility, and user-experience."
Here is another Quantum Refrigeration system that is available as a turnkey system:
The SD system from "Bluefors" systems designed for Quantum Computing. This system's vase temperature guaranteed at 30 mk.
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