#Quantum Computer

Oxide Corporation, an optical crystal maker in Hokuto, Yamanashi, began selling Frequad-K, a 302nm UV laser source for quantum computers, on March 9, 2026. The wavelength is what excites ytterbium atoms into the Rydberg states neutral-atom machines need, and the first unit went to a domestic customer. We look at why 95% world share in semiconductor wafer inspection crystals transfers to quantum, and at the 436nm quantum communications laser Oxide shipped to LQUOM in July.

A Japanese research team from Fukui, Tohoku, Chiba, and Tokyo universities has theoretically proposed a new method to detect Majorana particles using spin currents. Not an observation but a proposal, it opens a fresh window onto the quasiparticle behind topological quantum computing, the same goal Microsoft's Majorana 1 chip pursues.

Hitachi and the Institute of Science Tokyo extended coherence time roughly 280-fold and demonstrated 99.1% gate fidelity on natural silicon, the material standard semiconductor fabs already use, with no isotope purification. The result comes from a Concatenated Continuous Drive scheme combining continuous microwave irradiation with phase modulation. Unlike the superconducting route taken by IBM and Google, it builds on existing chipmaking, with cloud access targeted for fiscal 2027.

A research team at Osaka University's QIQB has proposed a scalable photonic routing architecture for ion trap quantum computers. By comparing two multi-wavelength laser delivery methods, they demonstrated a path to controlling hundreds to thousands of qubits on a single chip—potentially reshaping the future of trapped-ion quantum computing.

Japanese startup blueqat unveiled Japan's first domestic semiconductor quantum computer at SEMICON Japan 2025. Leveraging existing chip manufacturing technology, the company targets 1 million qubits by 2030 and commercial deployment in 2026. With relaxed temperature requirements compared to superconducting systems, desktop-sized quantum computers may become reality.