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A compact cryogen-free continuous adiabatic demagnetization refrigeration platform for quantum technology
P Schüßler1, R A Chandavar1, S I Afroozeh Borjeni1
1kiutra GmbH, Flößergasse 2, 81369 Munich, Germany.
The Review of Scientific Instruments
|February 27, 2026
Summary
A new compact, cryogen-free cooling platform uses a continuous adiabatic demagnetization refrigerator (cADR) to achieve sub-30 mK temperatures for quantum hardware. This technology enables scalable quantum processors without helium-3, meeting space constraints.
Area of Science:
- Quantum Computing
- Cryogenics
- Low-Temperature Physics
Background:
- Quantum hardware requires ultra-low temperatures for operation.
- Traditional cryogenic systems often rely on helium-3, posing infrastructure and cost challenges.
- Developing compact, cryogen-free cooling is crucial for scalable quantum applications.
Purpose of the Study:
- To demonstrate a compact, fully cryogen-free cooling platform for quantum hardware.
- To showcase the performance of a continuous adiabatic demagnetization refrigerator (cADR) for quantum applications.
- To provide a foundation for future quantum hardware platforms with limited space and infrastructure.
Main Methods:
- Design and implementation of a four-stage continuous adiabatic demagnetization refrigerator (cADR).
- Integration of mechanical and superconducting heat switches for thermal cycling.
- Incorporation of high-density radio frequency (RF) wiring for quantum processor control and readout.
Main Results:
- Achieved continuous cooling below 30 mK without helium-3.
- Demonstrated a compact, single-rack form factor.
- Successfully integrated infrastructure for a five-qubit superconducting quantum processor.
Conclusions:
- Continuous adiabatic demagnetization refrigerator (cADR) technology can be realized in a compact form factor.
- The developed platform is suitable for quantum hardware applications with stringent space and infrastructure constraints.
- This technology serves as a basis for future, scalable quantum computing platforms.
