Large-scale magnetic cooling for quantum computing

As quantum computing advances towards large-scale deployment, achieving ultra-low temperatures efficiently and reliably has become paramount. A promising solution is to scale adiabatic demagnetization refrigeration (ADR), a technique capable of reaching millikelvin temperatures without requiring cryogenic liquids, most notably a technology independent of helium-3. We present a significant milestone, achieving sub-30mK temperatures continuously with ADR for the first time, paving the way for future quantum computing platforms. Our primary objective is to enhance critical ADR components, including mechanical and superconducting (SC) heat switches, magnet and cooling media design as well as the exploration of novel refrigerants. These components are essential to improve cooling performance, both in temperature and cooling power, and ensure scalability. This presentation will cover ongoing research and innovative approaches across these domains, drawing on materials science, thermal management, and SC technology to advance ADR systems. By refining these fundamental technologies, ADR offers a scalable solution, positioning magnetic cooling as a vital platform for the next generation of quantum computing.