ULVAC, Inc. and ULVAC CRYOGENICS INC. have developed and installed a dilution refrigerator designed specifically for quantum computing applications, supporting Japan’s first fully domestically built quantum computer. The system, operational as of April 4, 2025, at the Center for Quantum Information and Quantum Biology, University of Osaka, plays a critical role in maintaining the ultra-low temperatures required for superconducting qubit operation. The initiative marks a significant milestone toward achieving supply chain independence for Japan’s quantum ecosystem, addressing long-standing challenges in locally sourcing core quantum technologies.
The newly deployed system integrates all major subsystems—including cryogenic infrastructure, control electronics, and qubit chips—based entirely on Japanese-developed technologies. ULVAC’s dilution refrigerator delivers continuous stable cooling to approximately 10 millikelvin, essential for maintaining qubit coherence. Engineering challenges such as thermal contraction, vibration suppression, and efficient flow path design were resolved through precision fabrication and advanced thermal simulations. The refrigerator adopts a modular architecture for scalability and is supported by ULVAC’s in-house manufacturing of all critical cryogenic and vacuum components, ensuring long-term operational support.
The system will be publicly demonstrated at Expo 2025 Osaka, Kansai, Japan, during the “entangle moment – [quantum | earth | universe] × art” event from August 14–20, 2025, where visitors will interact with the quantum computer via cloud access. ULVAC’s future plans include extending its contributions to the broader global quantum infrastructure market by leveraging its expertise in cryogenics and vacuum engineering to support scalable and fault-tolerant quantum computing initiatives.
Read the full announcement from ULVAC here.
April 25, 2025
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