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Berkeley Lab is advancing superconducting quantum computing by integrating dilution refrigerators that maintain QPU temperatures below 20 millikelvin to enable scalable error-corrected operations. This holistic approach addresses the critical infrastructure challenges of wiring and thermal management required for real-world applications in drug discovery and cosmology.

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Dilution Refrigerators Cool QPUs Below 20 Millikelvin

Quantum ZeitgeistJune 12, 20266 min read

Berkeley Lab researchers are building the technology for functional quantum computers, including superconducting quantum processing units (QPUs).

Researchers at Lawrence Berkeley National Laboratory are pushing the boundaries of quantum computing by focusing on the complete system needed to harness its potential, not just the qubits themselves. Central to this effort is maintaining a superconducting quantum processing unit at 20 millikelvin, a temperature colder than outer space and just 0.02 degrees above absolute zero, using specialized dilution refrigerators that resemble “golden chandeliers with cables running up and down.” These cables are critical for both sending control signals to the processor and receiving information from it at room temperature. “Making a functional quantum computer requires much more than qubits alone; it takes an entire technology stack that can harness quantum science for real-world applications,” explains Chris…

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