On August 27, Taiyo Nippon Sanso (TNSC) announced to develop a high efficiency refrigeration technology for industrialization of quantum computers with IHI and Advanced Industrial Science and Technology (AIST).

  It is a publicly-applied and authorized project titled “Research and Development Project of the Enhanced Infrastructures for Post-5G Information and Communication Systems” which is subsidized by NEDO (New Energy & Industrial Development Organization), for a period of three years from 2025 to 2027.

　To realize a practical quantum computer, a large-scale system is required having about a million bits of physical quantum (basic data units of quantum computer). To this end, aiming to minimize errors by heat and others, they need a refrigerating device which can work in a stable condition at a temperature range of several dozen mK (a cryogenic territory close to millikelvin or 0 kelvin which is thought to be difficult to reach). Therefore, they say a larger size device and energy-saving measures are needed.

  In the public invitation project adopted this time, the three companies are going to jointly develop and make verification of a cryogenic refrigerating system of 10,000 physical quantum bit class which is provided with much higher refrigerating capacity and an excellent energetic efficiency than before. 

IHI which engages in cryogenic refrigerator develops a several-K refrigeration system (turbo-type refrigerating system) and make management of the whole of the system. TNSC develops the elemental technologies necessary to meet larger-size refrigerating system of several-dozen K taking advantage of its accumulated know-how on dilution refrigerator. AIST makes performance evaluation of the turbo-type refrigerator and the dilution refrigeration system.