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Researchers have developed an ultracompact dilution refrigerator that reduces superconducting qubit cooldown times from over 24 hours to just 1.2 hours while maintaining 99% gate fidelity. This acceleration in thermal cycling significantly speeds up the testing and iteration process for superconducting quantum devices without sacrificing performance metrics.
Researchers Achieve 99% Qubit Fidelity with Rapid Cooler
A complete cooldown cycle for superconducting qubits now takes just 1. 2 hours, a dramatic reduction from the day or more previously required. This ultracompact refrigerator achieves this speed while maintaining competitive qubit performance, reaching single-qubit gate fidelities of up to 99% at comparable temperatures.
Clément Geffroy and colleagues have created an ultracompact refrigerator that cools superconducting quantum devices to 70 millikelvins in 1.2 hours during unloaded cycles. The device, weighing three kilograms and with a diameter of one hundred millimeters, achieves single-qubit gate fidelity up to 99%, matching the performance of larger systems at similar temperatures. This compact dilution refrigerator sharply speeds up testing; conventional systems require cooldown times lasting a day or more, but this new system completes a full cycle in two hours and one minute when equipped for measurements. The system delivers key…
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