Superconducting-qubit lithography (Nb/Al JJ, 300 mm) — IBM Albany 300 mm / Anderon foundry; Google Santa Barbara; Rigetti ABAA trimming (97.4% frequency-targeting success); OQC 500-qubit wafer-scale…
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A photograph through a glass showcase of the cryogenic 'chandelier' in a Fujitsu quantum-computer exhibit: about six stacked plates, silver above and gold below, wrapped in loops of silver coaxial cable. Taken by RuinDig/Yuki Uchida on 31 October 2025 at the Japan Mobility Show 2025, Tokyo Big Sight, in the 'Tokyo Future Tour 2035' booth. It shows the dilution-refrigerator stages that cool the processor, with coax lines carrying signals from room-temperature electronics to each qubit; the 'SKYDRIVE' sign across it is a reflection.“Japan-Mobility-Show-2025-RuinDig 0571” by RuinDig/Yuki Uchida, commons.wikimedia.org/wiki/File:Japan-Mobility-Show-2025-Rui…, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)A photograph looking steeply along the axis of the exhibited Fujitsu dilution-refrigerator chandelier, through showcase glass: gold-plated stage plates carry looped silver coax lines and rectangular component blocks around a central column. Taken by RuinDig/Yuki Uchida on 31 October 2025 at the Japan Mobility Show 2025, Tokyo Big Sight, in the 'Tokyo Future Tour 2035' booth. It shows how densely coaxial wiring from room-temperature electronics to the qubits is packed on each cooling stage; the glass walls mirror the object, so some copies are reflections.“Japan-Mobility-Show-2025-RuinDig 0573” by RuinDig/Yuki Uchida, commons.wikimedia.org/wiki/File:Japan-Mobility-Show-2025-Rui…, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)A photograph of Fujitsu's quantum-computer exhibit at the Japan Mobility Show 2025 at Tokyo Big Sight, in the 'Tokyo Future Tour 2035' booth, taken by RuinDig/Yuki Uchida on 2025-10-31. A lit showcase holds the open dilution-refrigerator 'chandelier': stacked plates, gold-coloured cold stages and dense coaxial wiring, flanked by video screens. Notice how much wiring runs down through the stages: each line carries control or readout signals from room-temperature electronics to the superconducting chip at the bottom.“Japan-Mobility-Show-2025-RuinDig 0570” by RuinDig/Yuki Uchida, commons.wikimedia.org/wiki/File:Japan-Mobility-Show-2025-Rui…, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)